trim kits

Hi there! My wife and I recently bought our first detached home! We bought a Moen Trim Kit for our upstairs bathroom, however, when the plumber we hired to install it (among many other things) came to do the work, he said he could not install it because he has never seen this valve before...

Hello, New here! I would like to kind of "mix and match" a shower and tub trim kit with Moen pieces. Is that at all possible? Any help with this would be very much appreciated! Thanks!