M3 mirrors on my 05 325iT touring

Sorry guys I searched and could not find the info I need. I believe finding the right base plate was the issue. So ... from what I found so far, I should buy M3 mirrors from a coupe and transfer my ribbon motors into the M3 housings, and use the M3 mirror glass on my non-M mirror motor ?? Can I attach the M3 mirrors to my OEM baseplates, or just modify the OEM M3 baseplates to fit my iT ?? Any help or redirection to DIY's would be helpful. Thanks