Solid core power cords under 300$ - List of manufacturers ?

Nice to see a thread about solid core conductor power cords - I find they make a worthwhile difference compared to stranded conductors, insofar I'm able to tell with the testing and comparisons I've done. Mine are DIY 12/15AWG installation wires bought at the local "Home Depot"-style warehouse (Bauhaus). I stripped the individual (and insulated) solid core wires from the outer sleeves, and then twisted the lead and return wires with some 3 twists per 4" (ground wire, where it may be used, is twisted in the opposite direction), and terminated each end with IeGO 8055 pure copper connectors. The twisting itself should act as a mild electrical shield, and I use no further insulation or shielding. The installation wires are quite cheap (usually sold with 3 or 5 conductors under two outer sleeves), but use high quality, very pure copper - at least here in Denmark, but I suspect the same applies in other countries. I wanted to avoid alloys in the connectors, and therefore opted for the IeGO pure copper plugs both for the wall outlet and components. The sound through my setup with these power cords seems dynamically uninhibited, pure and with very little inherent signature. Try them out cheaply without dedicated connectors to begin with, and see whether they're to your liking. 

I saw that silver solid core power cords from crystal cable and cabledyne have no ground wire.
What are the advantages and disadvantages of having no ground cable?

I thought about DIY too - a CAT7 ethernet cable with 8 22AWG OFC solid core conductors, shielded. They are arranged in 4x 2 twisted pairs. I could use a twisted pair for Live/ground or Neutral/ground and get AWG19 effectively or use the shield as ground conductor and use all wires for live/neutral only and get AWG16 effectively.

Any recommendation?

My components draw less than 1 Ampere only and I would use that wire only for the low power components. For the power cord that feeds the distributor block i would use a 13AWG Audioquest NRG-2.

This is the cable description :
http://shop.sommercable.com/en/Cables/Bulk-Cables-Fiber-LAN-CAT/Cat-7a-SC-MERCATOR-CAT-7a-CPR-Versio...
And the picture:
https://www.ebay.at/itm/Sommer-Cable-580-0417F-SC-MERCATOR-CAT-7a-Fiber-LAN-CAT-Cable-Computer-Medie...

I saw that silver solid core power cords from crystal cable and cabledyne have no ground wire.  ... 

zuio -  Cabledyne does have a ground wire.  It uses a 3 conductor design.  It is the Inconel sheath that is not grounded.  Don't know about Crystal cable.

http://www.cabledyne.com/premier-silver-mains-cable.html

The Cabledy�ne synergy power cord doesn't.

I saw that silver solid core power cords from crystal cable and cabledyne have no ground wire.
What are the advantages and disadvantages of having no ground cable?

If the piece of equipment, that the power cord will be connected to, requires an equipment grounding conductor then the power cord must have an equipment grounding conductor. (The IEC male inlet on the equipment will have 3 pins. Hot, Neutral, and equipment ground.)

If the piece of equipment is Class ll Listed (Has internal double insulated AC power wiring) and does not use the equipment grounding conductor, (the IEC AC mains inlet connector is only 2 wire), then the power cord, AC plug, and female IEC connector, only needs to be 2 wire.

I thought about DIY too - a CAT7 ethernet cable with 8 22AWG OFC solid core conductors, shielded. They are arranged in 4x 2 twisted pairs. I could use a twisted pair for Live/ground or Neutral/ground and get AWG19 effectively or use the shield as ground conductor and use all wires for live/neutral only and get AWG16 effectively.

You cannot use Ethernet data cable. The voltage rating of the insulation covering the conductors of the wires is not rated for 230V.
Just a guess for your country, Austria, the minimum required voltage rating is 300 volts.
.