American Standard Tub/Shower Identification

[Junkie_Vince]

Anyone here familiar with American Standard t+s cartridges? Need to go fix this for a family member and I’d like to buy the parts in advance if possible since I can only go out there when most places are closed. Don't have much experience with American Standard but finding that some use a single cartridge while others use a cartridge plus a pressure balancing cartridge together but not sure which this is. I've looked at the AS website and found it looks similar to the Serin trim kit but still quite a bit different. It's only 6-8 years old from my understanding so I thought it would be easy to ID from the pic they sent. I was told water only trickles out and its not even enough to run the shower. Any ideas?

 

[Junkie_Vince]

This turned out to be a M952100-0070A and a A954440-0070A. Unfortunately, both seem next to impossible to get at the moment.