I can’t answer your question about waiting times, but otherwise it might be worth looking into other doctors… I don’t know if Dr Mehta in AZ who works with Dr Nakaji does stenting, there have been lots of mentions about what a good doctor he is, here’s a current discussion:
Learning about options - Welcome / New User Help - Living with Eagle
And @Bmmac mentions that he does in this post:
Calcified ligaments - General - Living with Eagle
There may well be other doctors who do the stenting, hopefully others can give you info!