I recently noticed that the round grill on my 2007 Casita’s roof mounted A/C had disappeared. The shroud was still in place and the grille’s two “ears” were still in place serving (somewhat) as fasteners for the top sides of the shroud but the grille itself was “ripped off”.
I found several web references for the replacement grille but, unfortunately, each of the web sites advised me that (a
) they could not order the part from their vendor or (b
) the part was obsolete.
Rather than pursuing a replacement shroud, I fashioned a replacement for the grille using ¼" vinyl-coated hardware cloth and 1/16" x ½" aluminum bars. I trimed the hardware cloth to size and folded ½" of the hardware cloth under the aluminum bars on all four sides. I then bolted thru the aluminum bars into the shroud with #6 bolts & lock washers to hold the replacement grille in place on the shroud. Finally, I used 6" strips of flat 1 3/8" slotted flat steel bar to replace the two “ears” to hold the shroud in place on the frame of the A/C unit. See attached pic.
In lieu of the hardware cloth, you might want to substitute something like this stainless steel wire mesh
Could that work?