A 1st gen Sport door skin is a very difficult part to find. It is no longer manufactured as a collision replacement part.
You will need 91-94's 2-door. A deer ran into my passenger side door last year, and the 2nd gen Sport doors didn't fit right. I had to find a door from a 1st gen truck--and it was tough to find! The wreck it came from, was totally ruined on the drivers side, but, fortunately, the passenger side door was intact.
It might take some time to find it so be patient. Knowing someone in the body shop business helps--they can call lots of places to find some obscure part.
For a while we were considering trying to just beat out the existing (bent up) door, if we couldn't find a replacement. That wouldn't have been perfect, but if you can't find the part, you have to do what you can with the old.