Just go buy a pair of pre-1987 doors.
An interesting thing I have noticed over the years: 1993 trucks SEEM to have the same doors as pre-1987 trucks, in that they have no vents.
I have 2 1993 trucks in the yard with no vents and I have had several others that didn't have them, either.
I've always thought that 1993 was the BEST year for these trucks and some of the silly little differences seem to prove that out.
Besides the door differences, the following is also different in 1993:
Speedometer design (actually a VERY late 1992 difference).
Overdrive/Cargo switch design.
Cargo lamp design (E/C) number of bulbs and type of socket, plastic vs steel.
According to the parts guides, the T-case and shifter for diesel is also different in 1993 (gated vs. non-gated?).
These are all that I can remember, but there are likely more.
Mark.