Stonehedge the OP was in 2009 he's probably finished :)
I just gave away a box of 4x XLR and 2X TRS plates. Must of been 6 of each in there. I was too lazy to do E bay so I gave them to a young and upcoming sound guy.
I hard wired my (past) studio using Belden ( 1303?) was # 22 and foil wrapped. It was what they used everywhere for installs. Still have a 1/4 roll of it.
I used the shrink wrap tip too. And all wall boxes where metal.
At the mixer end I made it into a 6 ' custom snake buy bundling and shrink wrapping, with XLR's plugged directly to the mixer. So it worked like a snake.
There were a few TRS that went out as headphone sends using the same cable. I only had one jack on the mixer but I could fake a send from an Aux using a few old Integrated amps. There were headphone jack wall plates all over the place out in the iso rooms and main area. 22 gauge is a little light for headphone wire, but nothing was more than 25' so it seemed to work fine.
Lots of soldering involved but including all the parts it was still cheaper than buying a good quality snake. And it certainly keeps things tidy.