89-91 parts are the least often reproduced parts in the world of squarebodies. The dash bezel is one of the main parts that nobody makes.
Production was winding down for the squarebody trucks with the main trucks being produced were the new GMT400 models. That left the suburban, Blazer and one tons being built at lower volumes. This translates to less of those trucks than the rest of the squarebody years where the reproduction houses aren't spending the money to tool up for parts with less folks to sell them too.
About all you can do is watch ebay for good used or NOS original parts. Or get lucky and find a decent one in the junkyard. Which that's getting harder to do now too. Watch the classifieds here as they come up sometimes.
