These cameras probably seldom need a CLA. I don't know for certain, of course, but I am pretty sure that there are multiple repair shops you can turn to. Just check KEH (https://www.ws.keh.com/rv/Brands.asp). And there are bound to be others, IMHO. But what's the point if it works? If I were you I wouldn't sell it, but I would get a second body.
I don't think they really need much in the way of a CLA. I don't think there is much to lube. The shutter is electronically controlled, hence not that much to adjust. The eyepiece diopter can get loose and slide everywhere and the eyepiece itself can loosen as well. That's all that has happened to mine. I'd get a second body as well. These things are dirt cheap right now.
I wish I knew of a specific shop for you though. I've yet to need one..