I found two identical early 90's vintage dishwashers of KitchenAid design on craigslist earlier this year within a couple of weeks of each other and they each cost me $40 or less.  Both were in operating condition.  After fixing a simple leak that involved tightening a single screw, one of them is the current daily driver in my kitchen and the other is stored away for parts. 

If you can find on craigslist a KA machine of similar vintage to the one you had, you'll get reliability better than anything new, and for a small fraction of the cost.  They turn up often enough that it shouldn't take you too long to locate one, particularly in the greater Los Angeles area.

Just FYI, Hobart produced KitchenAid dishwashers into the 20 series.  If you're interested in finding a Hobart machine, then you will be looking for a model number that reads something like:  KD (insert S,I or C here) 20, or KUD (S,I or C) 20.  I would suggest a KDS/KUDS model, which would be a top of the line Superba ("I"= Imperial, "C"= Custom).  A series 20 machine would be several years older than your 1993 machine, which I'm guessing was a series 22 or 23.  Steer clear of series 19, but if you find a series 18 in operating/serviceable condition, they are considered by many here to be the best KitchenAid dishwashers ever produced.  Also, with a Hobart machine, you can still readily obtain certain parts directly from Hobart, as they share some of their components with commercial machines still supported by Hobart.

Once Whirlpool took over, they began making changes and incorporating their technology into Hobart's design.  Still, you'd be safe with a series 21, or the quieter operating 22, or even a 23 series where Whirlpool's changes are more apparent inside and out.  After that, things get a little sketchy and a lot less Hobarty.