I'd like to try one as well. What do they go for on the used market?
I've gotten good TRS to RCA cables for my test setup from some Ebay sellers. I mean good as in they measure below the noise floor of my test gear.
Canare, Belden, etc. wire is what they use. If you want specific recommendations, I can find some for ya.
If you want something that your audiophile friends won't make fun of, I'd recommend DH Labs wire and cable. In fact, I had some made up at Moon Audio for just about what it would have cost me to do it myself.