I got my cases through my dealer, Scuderia West in San Francisco.
I don't know if there is currently a shortage of accessories, but your dealer should know that and tell you.
The Parts Dept. of your dealer should be able to get information straight from Brammo and communicate that to you. If that isn't happening, I suggest you email or call Brammo to let them know on their end so the link can be properly established. I have always found them to be responsive with the truth.