Now, the mirrors being mounted on the doors is not a problem when you take the doors off. There are many different way to mount side view mirror on the Jeep with out the doors present. Most common is mirror relocation brackets. Easiest is a pair of take off Harley mirrors through the hinge hole, or bicycle mirrors. I have even seen suction cup baby monitor mirrors used adhearded to the inside upper corners of the windshield.
Do a search and be creative.