Where to buy steering wheel wire harness

As I'm pulling my broken (as in turn signal lever flopping loose) turn sig, switch assy from my 68 fish, I notice that the replacement one i bought used from a FABO member (came from a used duster I believe, but in decent shape, not dry rotted from desert heat like mine) had some of the prongs loose in the connector. I realize I will have to take them all out in order to fish the wires through and then re press them back in. Whats a good way to get them to hold in the 40 plus year old plastic connector? I suppose I could cut and bullet connect the wires if they won't tighten up inn there. Thx, FABO