Autozone will probably have one of them in stock, and order the other for you. The 2.2" pulley upgrade on a 92/93 almost REQUIRES the ZZP oversized idler pulley in order to get enough belt wrap around the smaller pulley. It also allows you to keep the stock belt length, which is nice if you have to replace one in a year or two and can't remember the size.
The idler is available at www.zzperformance.com
and is confirmed to fit our cars (by me
Kicking this one down to forced induction......