A bit ago I literally snapped the single control shower faucet off in my hand. I have looked at several supply house's and was advised it could be an older model american standard. Given the price of fuel I am hoping to get some input from this forum. There are no manufacturers marking on it, only UPC on the cover and what appears to be EC stamped on the inside of the trim handle. The pictures don't have the all of the parts and in the one the "body" of the cartridge is still in the valve.

Can you post a picture?