Missing Targa screw

I have a 88 supra with a targa and one of the screws in the back of it is missing as it seems to have fallen out when I had it off one day. I was wondering If anyone knew the screw size or an alternative or a place I could get a replacement.
Thanks

Toyota still sells every part to the car, and it shouldn't cost more than a few bucks. Also see if you still have the spring and C-clip, if not you'll need those too. You'll need to remove the targa side moulding and weather stripping, then the headliner to get to it, just a bunch of hidden clips that hold it on.

ok thanks I'll check into that tommorrow