The official rule change for AS is official in fastrack. There are several brake manufacturers that we are allowed to use now with some restrictions. Off the top of my head so check out fastrack to verify, these manufacturers are Willwood (superlite and dynalite series) Brembo (sportline series) Coleman, Brakeman, Outlaw (tornado) and Sierra. Please double check in fastrack, Im recalling these by memory. Basically they have restricted us in master cylinder choices as we must use a stock master cylinder in the stock location, as well as our 16 inch wheels which restict the super expensive rotors and calipers that are out there due to clearance of the wheels. Also our new rule dictates rotors no larger than 12.2 inches in diameter.
I am in contact with a brake company that is willing to do all the legwork on developing a bolt on kit for AS cars for both Ford and Chevy. If I can generate enough interest in a group buy, the price will come way down. Using Wilwood components and compliant with the rules, this kit will be complete with hardware, rotors, hats, calipers, brake pads, brake lines, brackets, proper master cylinder requirements and legal. This kit would be a direct bolt on eliminating all the guesswork on the changeover. This kit is NOT yet available and needs to be developed, so if your looking to make the change quickly and painlessly as possible we need to get this ball rolling. Rough estimates on retail pricing for this kit are looking at $1700 ready to go. Remember a group buy will bring this price down. I can find out how much if I get enough interest from you the racers.
I would like to add that if you are happy with your current pbr setup you DO NOT have to change. The rule has not eliminated the old brakes. So now there are just more choices with proper racing brakes available to use if you so choose.
If you are interested please send me a PM and I'll get the answers to all questions you may have.