If you can solder, cables are pretty easy to build. You can make custom lengths that way too.
Years ago, I just bought a big spool of that Belden instrument cable. It uses "oxygen free copper" (OFC) for minimal loss - just like Monster, etc... tout. I used some heat shrink tubing on the ends for strain relief, and the 1/4" plugs I used were just the $1-2 ones at a local electronics parts place. They've been working fine - I haven't had any crackiling, failures, or tone problems (that weren't self-inflicted
).
If I was building these now, I would use Switchcraft 280 1/4" TS plugs for the interconnects. For the synthesizer components that I build and sell, I've been buying these connectors for ~$2/ea in bulk new off Ebay. Some places will charge $6-$10/ea for these. I want to replace all the connectors on my cables with Switchcraft ends at some point.