OK, for all you guys (and gals) that have an extra $6000 burning a hole in your pocket, here's a link so you can buy your very own new DRB !! :-)
But seriously, for a 1993 (pre-OBD2) all you need is an OTC Monitor 4000E, a cartridge 1993 or newer, and if you are the unfortunate owner of an A-604 4 speed electronic transmission too, then you need the Chrysler A-604 Transmission & Chassis (CCD) Adapter to go with it. You can readily pick up the scanner and cartridge on Ebay for roughly $75 or less. The CCD adapter is a little harder to find on Ebay, but they appear occasionally for anywhere from $20-$50.