AndyF is AR Engineering. You can get his stuff through Mancini, Hughes, Bob Mazzolini, etc. I have a bunch of Andy's stuff on my car, he makes nice parts.
At some point AR changed their adapters to use updated Wilwood calipers. Not sure if he even makes them anymore though.
What kind of application is this for, race car or street? There are some very lightweight systems out there but typically they are for dedicated race cars and are not really great for the street. Aerospace and Strange make 'Pro Street' type kits, sure Wilwood does too.
Systems like that tend to use the 65-72 drum spindles with a rotor hat/adapter and various bracketry to make them work. They're also pricey.