the 126 coin acceptor is more for a change machine, and thus would have the acceptor entries stamped into the front or a specially molded part for the machine. i am an expert by no means but, i guess it could be fitted to anything should you feel inclined.
i believe a mounting plate for a "111" might just fit. it looks about the same and is a little more common. there was a front and a top entry for the coins. you will have to take a look at the one you have.