Built my own and very happy with it. Purchased all parts from VH Audio.
https://www.vhaudio.com/wire.html
https://www.vhaudio.com/images/shieldedtwistedpairbulk.jpg
Shielded Twisted Pair (12 AWG X 2) $10.99 per foot.
https://www.vhaudio.com/connectors-ac.html
Furutech F11-M (CU) $48.99
https://www.vhaudio.com/images/fi-11mcu.jpg
Furutech FI-8N C7 $56.99
https://www.vhaudio.com/images/furutech-fi-8n.jpg
If you build your own I’d recommend a shielded cable and only connect the shield at the wall receptacle end to the ground and on the equipment end it floats as it’s only two conductor with the C7 plug but even with a three prong plug the shield still floats. I use this cable with my Vault 2 and it made a nice improvement over the stock PC. Haven’t tried any others but I’m sure it’ll keep up with anything else in its price point.I’ll take a picture and add it to my system if you want to see how it looks. One could add some tech-flex to dress it up but I like the way the raw cable looks so left alone.
Just noticed I used the gold plated plug.
Furutech F11-M N1
$69.99
https://www.vhaudio.com/images/fi-11mg.jpg