Symmons Shower valve PLATE

I am remodeling a bathroom, and would like to reuse the Symmons Temp-trol shower/bath valve, which is barely a year old.
So the deal is they used this large round plate to hide the large hole.
But now I am rebuilding the whole wall/tile so I could cut a small hole, is there a way to get a small cover plate? That would still work with the Symmons setup??
Thanks
geoff

The smaller hole will work with the large cover plate. Just be sure to notch out the wallboard/tile for the screw holes that the cover attaches to. Also make sure the center trim ring has clearance to screw onto the valve body. I made the mistake of trying to make the hole too tight, and I had to use my grinder on the finished tile to make room for the chrome trim that goes over the threads.