I asked some local contacts about 'next steps' but no one had an answer that was any different than what I suspected: Short of either buying a different kit or redesigning the bracket that Airkewld created, I had to use the original brackets and washers. I went to the local Home Depot and found extra bolts and 20 washers. I used the extra bolts to 'thread' the aluminum holes in the Wilwood calipers and then strip that thread away by intentionally over-tightening them. I used that technique on both sides of the mounting hole and stripped away 80% of the thread I'd created to open up the holes. Took about 20 minutes to do all four holes and another 10 minutes to mount the caliper and top ball joint.
I wound up using a total of ten washers per caliper. I'm not at all happy about using 20 f'ing washers on a brake kit that should be designed to eliminate half-assed inventions. There is roughly 1 - 2 mm of space between the caliper and the rotor now that it's mounted/centered. I'm hoping that it won't rub but I won't be the least bit surprised if it does wind up rubbing.
No pictures were taken of the final install on the passenger's side - phone died and the camera decided it doesn't like the humidity in the garage. I'll see about photos once I get the driver's side installed...or I have time to go back out and take them.
After this bit of fun, I get to figure out the reservoir mounting situation and then bleed the brakes (my favorite thing to do) before I can drive the car.