I won't be a big help here, since our's is not integrated - we have a separate wire - but I've found that
www.rockauto.com has
all kinds of parts. We have a 1990-1/2 ('not quite a '91) KA24E and are wrapping up a 'frame-off' restoration. If we didn't refurbish a part by ourselves, we ordered most of our stuff from 'rockauto' (unless, of course, it was "dealer only" type parts).
I would browse around on their site at least just to poke around. The "more info" visuals are a helpful reference.