I think its time to give in and buy a new wiring harness

I am just chasing my tail with my 68 fastback. It seems like just about every connector is troubled. Jiggle it a little and the test light comes on, twist it a bit and the light goes out
So what brand of wiring harnesses do you folks like.
American autowire doesnt look factory, nor does Ron Francis, M and H looks pretty much plug and play. Best prices on M and H seem to be Vans Auto LLC on Ebay.
Then there's painless of which I know very little.
Some of these can't even figure out how they work, I cant even see a firewall connector. And the fuse box is modern with the plug fuses.
are there other brands or sources I am overlooking?
Thanks
Neal