I've been so curious about a double a-arm setup for years, figured I finally should try one and find out. Worst case scenario, I have to cut off the welded tabs, and go to my tried-and-proven modified stock setup like I run on the red beetle. I somewhat doubt that will be the case though!
It looks like
Wilwood 120-12069 is the caliper that will do what I need. The e-brake cable input has multiple positions, so I should be able to make it fit...