My coach (a 2005) uses the Wabco-Meritor System Saver 1200 air dryer. cartridge part number R950011. Yours (@Jerry) looks very much like mine. Possibly Beaver-Monaco was using both models (using up old stock in 2003-04, and your coach got the newer model).
On the Wabco-Haldex website, the DQ6032 is a coalescing filter for the Haldex "Pure Air Plus" dryer. The DA33120 is the desiccant cartridge/filter.
I looked at the Haldex-Wabco "Pure Air Plus" unit and I don't think yours looks like that (based on my old and fleeting memory).
See if you can post a photo - or get the part number of the id tag on the air dryer housing.
PS. I don't know which companies all merged togehter in the truck-parts industry now - but I think Bendix, Meritor, Wabco, and Haldex are all the same.