Anybody I know who has wanted Bloomer heads has had zero issue getting them. It’s not that hard. I had to wait about a month to get mine, setup per my cam specs. You would be surprised how many sets they have sold.
Don’t know how much easier it could possibly be. So yea, the availability is generally excellent.
Just cause Summit doesn’t sell them doesn’t make them any harder to get. How many times has Trick flow not had anything available.