Bike mirror extension bracket

I have a bike mirror I really like but the bracket won't fit on my handlebars. I custom-designed this bracket as a result. I glued a little bit of rubber from an old tube on the inside so it doesn't slide around. The bracket from the mirror fits on that big barrel post, and I used rubber there too. This bracket also lets the mirror stick up and out a little bit more so the visibility's better. You'll need a bolt and nut to secure it.

PLA is probably not the best choice; something strong