HiDiamond Power cords...

Moonguy, I am not sure. I guess you will have to ask Robert from Worldwide.
I know I had discussed with him about getting a power cord with the IEC end detached for possible hard wiring. Perhaps just buy a Neutrik powercon connector and exchange the ends yourself.

Well,Sabai,

I just purchased several of these
PC-US-GFAL-R
Graphite fibre Power plug (IEC plug, Male)
PC-IEC-GFAL-R
Graphite fibre Power plug (IEC plug, Female)

http://www.vt4c.com/shop/program/main.php?group_id=3&cat_id=1015#909

Looks to me to be similiar to what comes on the HD Power cord 4.

@Sabai, I don't understand the reason for changing the connectors on a HD power 3 cord if you liked the P3 sound for its low price point compared to others. You now have made this a $900 power cord and you have just crimped the wire to the connector without soldering them. What are the positive differences with the new connectors compared to the regular P3 connectors?

Ozzy,
They look good but I have no experience with them and I have not tried the P4 yet. I also do a special mod to my P3 and some other power cords that greatly improves the sound.

Bacardi,
Liking the Power 3 has nothing to do with the price point for me. It has to do with the sonics. I did not crimp the wire because the ends of the Power 3 are soldered. The positive differences are much better sound stage, detail/definition, and tonal qualities/harmonics. I must add that I do my own mod to the cord/connection that improves the sonics even more. This is proprietary.