I was checking that out a while ago. It could be that a few Ebay chips won't delete the EWS-II, I'm not aware of which are suitable. That's always been the solution though - either an earlier maroon DME (chip or no chip), or the later silver unit with an EWS-II delete chip and a cut EWS signal wire.
I also wasn't 100% clear if anyone had done an EWS-II delete on an M44 DME. I know the EWS-II wire is different on the M4x motors.