I have a mirror that would work great on your 2012 Can Am Commander with 2 inch bars, but the # CM33000 that you referenced is designed to attach to windshields so it would not work.
You would want the CIPA Extra Large UTV Rearview Mirror # CM-99287 as this has been confirmed to fit bars that are from 1-3/4" to 2" like what you have.
I attached an install video for this mirror for you to check out as well. view full answer...
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