Chinook RV

I have removed the slide-out battery tray from our 2004 Chinook Concourse XL. Brand name is Kwikee, but no part number.
Rather than clean up and powder-coat the original assembly, it almost looks easier to replace the slides, if not the drawer as well.
Does anyone know the weight capacity of the original tray assembly, a part number, or a source for the assembly or the slides?
I'm waiting for a call from tech support at Del City, but none of the Kwikee drawers on their web site match the original's dimensions.
Thanks. AL in Lake Havasu City, Arizona

I just painted them with epoxy paint after I brushed off the rust, and primed the parts. My slides are fine after I clean the bearings, and lub it with lithium.

Just as a side note: If one is using AGM or other batteries that don't need "watering," then an option is to remove the tray. It's just four fasteners as I remember it. The tray is pretty heavy so you lose weight and gain space. Of course some people may prefer to keep the tray in place.