"Mount" is what you call the thingy that goes between the tripod or pier and OTA and permits the OTA to be pointed in different directions. You sent your mount (CGEM) back to Celestron and you are looking for another mount to use until you get your CGEM back. This "interim" mount needs to be able to support the weight of your OTA and mechanically mate to your tripod or pier and your OTA. The only off-the-shelf mount meeting these requirements that I can think of is another CGEM. You could go with an Atlas, Sirius, or even a CG5 but you'd need to adapt their vixen style saddles to the D style dovetail. I could be wrong.