So, like this one?
You know, exactly like that one. I gave in and got one from eBay for $8.99 with only $2.30 shipping. They appear to be homemade, but they're solid and work great. In case you are wondering, Neutopia's soundtrack is crap in MONO (sounds great in stereo - why did it take so long to notice this error?).
When I finally get some more spare change I think I'll do as BT did and pick up some flux (I have enough other soldering tools), some cheap, long stereo RCA A/V cables from Monoprice, and some MIDI/DIN-5 connectors and make a few to sell/distribute. It'd give me some soldering practice and a chance to give back affordably to the community here.