Putting a gun together is super simple. I have a video in my signature about teardown and reassembly of Spyders that you may want to watch and learn how.
If you're handy with a soldering iron then those wires shouldn't be any trouble at all! Spyders are built like tanks and shouldn't be too hard to rebuild. I've never met a Spyder I couldn't fix with one part or another...
I'm the kind of guy who digs deep into the guts of arc welders for kicks (and to fix them, it's not just from boredom!) and builds guns from scratch just to say I did. If you need help, electrical or mechanical, I can probably render that aid.