Call Moens 800 number, they'll send you screws for free

I took the eschuechon plate off of a single handle Moen shower control so
I could caulk behind it, ditto the tub spout. I caulked, then went to put
the esch plate back on, but the screws are too short. They don't reach
the holes in the valve body. Longer ones don't work because the threads
are nothing like what I have in the truck, they aren't 6/32 or /32, one's
too small and the other too large.