That dish appears to be a one-piece fiberglass, or perhaps a heavy spun aluminum dish with a rolled edge. Either way, IF I'm right, you can separate the dish from the mount, but the dish itself would not come apart in sections.Out of curiosity, I've asked if anybody in my area, Carrollton, MO & the surrounding area, had any dishes & I got one offer, however I will have to take down the dish. The dish is an older one & I don't know how to take one down. Are the dishes, like this one, assembled\dissassembled in sections?
IF you can get a photo or two of the BACK, we could maybe tell more.