tochsii-
How would I make my own?
Well first you would let someone sell you on the idea this is something worth doing. Then you would let someone sell you on the idea they know what materials and construction will be best for your budget and sonic preferences. Then you would shop around and buy the wire, insulation, terminations, solder, soldering gun, wire strippers, and electrical shrink wrap. Then you would let someone sell you on the idea they know what is the best way to put this all together. Because every single one of these things makes a difference, and you know nothing about it. So to say this is a leap of faith trusting someone you never met to tell you how to do it, don't even begin to cover it.
So let me tell you about making your own. I'm all for DIY. Did you look at my system???! Look at my system!
https://systems.audiogon.com/systems/8367 DIY turntable. DIY rack. DIY acoustic panels. DIY power conditioner. DIY subs. And practically everything that's not DIY has been modded.
Now why do you suppose a guy this much into DIY has no DIY cables? Its not for lack of trying! I have a whole drawer full of old cables. Even at one point had some DIY cables. Because once long ago I was dim and gullible enough to be sold on the idea and so I tried. Then I met a guy who was as much a believer in DIY cables as anyone you will ever meet here or anywhere else. This guy had 30 years practice working on DIY cables. One time he comes over all excited to show me his masterpiece, the best IC he ever made in his 30 years. We plugged it in. It sucked. Well that was compared to some moderately priced cables. So I went to my old cable drawer, pulled out the oldest cheapest one in there. Cost a fraction of what he had in his just in parts. To say the guy was shattered wouldn't do it justice. His masterpiece was so utterly destroyed by my old discarded cheap cable he couldn't even try and deny it.
So listen, you can buy cones. You can buy cables. But if you decide to make your own.... GOOD LUCK!