These were always considered 'specials' and were only available from select dealers. I don't think anyone knows if and when AT will resume production. I also doubt if anyone has them, although motors do seem to pop up from time to time, so you could check with vendors who list them. Performance Hobbies and Magnum are two that come to mind. Ken at Perf Hobbies had a few F72s at the last launch, don't remember seeing a G55, but I could have missed them. Some have shown up on ROL auctions so you migh monitor that.