I was on Colonial's website the other day looking at other trailer interiors, as came across a 25' CCD. The rear window had the opening side bar, and appropriate trim piece on the window. Are the two windows the same size? Of course, swapping is complicated by how the trim is obscured in the Bambi by the bulkhead partition.
Otherwise, so far I use a not-so-pretty block of wood to prop it open.
Chris and Christina- Boerne, TX / Evergreen, CO - TAC TX-7
2008 27'FB Int'l Signature CCD