I believe Guidon made those both for Suzuki dealers and the aftermarket here in the US. They were probably the most common hardtop available until the late 80s when they stopped making them
For latches, I would check Grainger.
I have a Guidon top made in 2000 at a franchise plant in Paola, KS. They sitll had the molds, but only a couple of old hands remembered how to mount one. I'm sure it was the last one made at that location, as they went out of business soon after.
My side windows are 2-piece, sliding glass; & back hatch is hinged to top. I don't know IF Guidon made variations other than a half-cab with deck over back end.
I think Grainger's is a good place to start. Seems as though I've seen better mounting hardware than what came on mine. I'm sure there were lots of types used.