Sorry I can't help you with a set, but when I purchased my 93 LS new in June of 1993, it came with the front guards but not the rear. I purchased them from the Mazda parts counter a couple weeks later and installed them myself. I always thought that was strange that they came only on the front when new. Is that the way it was? I should take a look at my original window sticker to see what options are listed.
Keep looking, there must be a set out there for you somewhere. Good luck,