I don't think that's right. The last vin in '93 was 129311 and was builit in July of 93. My Montana Blue vin is 128572, but in May of 93 and has the chrome wheels. In fact, every Montana Blue I have ever seen has chrome wheels. Of course, that doesn't mean they all do, but they may.
Chrome wheels were an extra cost option in 1993 on Allante's. The digital instrument clusters were another extra cost option, as were removable hardtops. I believe those were the only three options available from the factory in 1993.