I MAY have the one you need, I have to look when I get home. I bought a bin (well, 3 bins) of parts from a guy who sold his 89 Montero to Pick-n-Pull. It had a distributor cap included.I think my mechanic pulled the rotor (?) from it when he was working on my 1990. What all do you need? And how does it look? Send a pic if you can, so I can compare it to the one I have.

1990 Montero LS (retrofit project!)