if you can find the switch at a junkyard, couldn't you cut up the switch and use the body and pins for you setup??

OR

When I need to do this type of thing sometimes it works to just use stranded wire and shove it in the cavity, this is what I did for my Perf Shift wire cause I was on a budget,

oh and Electrical tape, like good 3m is much easier to fix a wiring error than epoxy, just my .02