Molar spurs are not terribly uncommon, but you do want to find someone experienced with rabbits (first of all), and someone who knows how to do the teeth well. I’m not sure if you remember, but BunnyLiz had a bad experience with her OLD vet filing her buns teeth down WITHOUT sedation and using outdated tools. So while it’s good to find someone who can do this inexpensively, I would also want to know their methods and what they use to do it. This is something that he will probably need to have done periodically for the rest of his life, I think some people have it done every few months, some people every six months or so.
Let us know how the vet search goes.
EDITED:
I found the thread by BunnyLIz, pages 3-5 talks more about the teeth filing… https://www.binkybunny.com/FORUM/tabid/54/a…fault.aspx
The molar pics were posted by Soliel. I hope she doesn’t mind if I repost them here…
before:

After:
