There is a company that makes cables, and they are low quality but you can get them cheap. I don’t know if they are all TRS cables but the company is OSP and they make cheap stuffs here in Arkansas. I bought all kinds of patch cables from them for cheap.
They don’t have to be high quality cables just to send voltages through. You might want to go a better route (monster, lifetime warranty) for audio.
Sure, these are not as nice as cables made with Canare/Mogami/Belden/Gepco/Etc wire and Switchcraft/Nuetrik connectors, but for $1.75 a each, they will get you up and running quickly inexpensively and last for a while.
i buy all my TRS CV cables from the seller in the that 2nd ebay listing, totally can vouch for quality, they actually sound good for audio use too in a pinch (although i’m 100% mogami in that dept).