Looks like they will have what you need:
http://replacementradios.com/product_info.php?cPath=290_318&products_id=137
They list the following radio codes: RAZ, RBB, RBN, RBK, RBQ,They also have the option of unknown or other.
Here are our radio sales codes from the Jeep Factory Service Manual in case you need them. (I removed the export model radios):
RADIO
Available radios include:
AM/FM/cassette with CD changer control feature (RBB sales code)
AM/FM/cassette/CD/ with CD changer control feature (RAZ sales code)
AM/FM/CD with CD changer control feature (RBK sales code)
AM/FM/ 6 CD in-dash changer (RBQ sales code)
AM/FM/DVD with GPS navigation (RB1 sales code)
You could also try your local "u-pull-it" junk yards.
Good luck. I hope this helps you out.