Don't know if this'll help, but I have a '79 ute and the mounting holes for the side mirror on the passenger side were filled in (not by me). This leads me to believe that this model came fitted with both L & R side mirrors. That is, unless the door is from an older model ute.

If it were me I'd just fit another side mirror. Go to the wreckers and grab some Sunny ones (they suit quite nicely). I doubt you'd have a problem with the rim issue.

Also, in our great state you don't lose the points on your licence until you pay the fine. Therefore you could get your 'opens' and then address the defect and maintain your licence.