I imagine you've found J&P Cycles by now. They have just about everything. Jireh Cycles is good too.
After I spent 4 hours rewiring my tail section and creating my own connector sockets, shrink wrap insulation, etc., I went on J&P's website and found a rear harness for $14. Live and learn, though!
My current debacle is the primary caps- the PO dogged them down good without any O-rings, I'm guessing. I have the correct bung tool, and I've tried heat, a cheater bar, and even resigned myself to destroying them with a big cold chisel trying to loosen them up, with no success. I'm trolling Ebay for a new cover now.