Yep thats a early td42 gq for sure , eng number low is it?
And yes PTO winch for gq,s are a rare bird compared to the Toyota ones or after market
power autos or thomas,s that were also fitted to vehicles of that era
To be honest the drive-shafts and winch its self can be made up using those makes listed , but its the PTO itself ,thats the hard bit to find , and in reasonable condition.
Some do come up on trade me New Zealand , but with freight and the fact the bro,s now know there value , its really just to much.
Plus with the cheap, cheap electric winches, readily available seemly everywhere nowadays,
Its more something to fit if you find one cheap and local.
I have had a PTO on FJ45 cruiser and although there pretty well bullet proof , there are not really very user friendly or safe , compared to a remote operated electric one.
I was chasing just the PTO myself awhile back , cause I had some crazy notion of fitting a
air cond comp to one , under the car for pumping up big rubber, but came to my senses!