It is not difficult. I'm tearing down a MIJ Slingerland clone snare stand to be brass plated.
Time consuming so try and mend what you have first.
I would find the replacement rivets before drilling/grinding/filing any of the originals off.
Then needed is a rivet setting kit. This affair is a rounded punch to seat the rivet and a bit that holds the domed part of the rivet.
Have been to your Country twice and it is wonderful. A leather craftsman may have worn out tools that would work. Anyone working with metal should be able to assist as well. Let us know if any questions
Creighton