Yes, I suppose it can be done. You'll need the latches:

https://www.minimania.com/part/CZH3536/Classic-Austin-Mini-Quarter-Window-Light-Catch-Left-Rear-Side-Mk111


And a piano hinge was used on the opposite side. You may have to find those from a specialty supplier. Will probably take a bit of trial and error to make it work properly. The glass may be different, too:

https://www.minimania.com/part/JRC5142/Classic-Mini-Glass-Clear-Quarterlight-Late


I would recommend finding someone on the forums who's already done this modification and ask them how they went about it.

Mini Mania Tech Team

The Classic Mini Parts and Accessories Experts