Brad-
Our '06 Monterey's in-dash radio has a 6-disc player but no tape player. Yours probably has a single-disc player and a tape player. Both models are briefly described in the master Beaver owners book. The seperate User Manual for my radio describes the 6-disc model only. The manufacturer is Visteon Corp.
If you like, I can scan the master owner's manual page for you. If your model is also a Visteon product (perhaps check their website for it?), the manual may be available there, otherwise I can scan my model's manual for you, as it may be of some limited benefit.
Joel
Addendum: I don't see your model on Visteon's site. I suggest you call Beaver Coach Sales parts desk in Bend, 1-800-382-2597, and see if they can clue you into the mfr.