The EPC indicates that -08-45 was used on the .030 chassis through model year 1987. From 88-up, it was originally -32-45, which superceded to -30-45, then -38-45, and finally -37-45.
What I think happened is that all 88-up models use the late 9-pin socket, but early versions (maybe 88-89?) only used some of those sockets, and only needed one fuse. Later versions used all 9 pins with two fuses, adding another circuit. The 2-fuse relay is backwards compatible with the 1-fuse, as long as it's from 88-up with the same pin layout. You still cannot use the 88+ OVP in an 86-87 car.
Bottom line - not all single-fuse OVP's have the same layout! Interesting - I didn't know that. Thanks for the info, Eric!