There are 16" wheels that fit over Cobra brakes, but I have no idea if that would help your combo. .
Who makes these 16" wheels that would clear the brakes? I have heard mention of this before, but I thought it was just talk.
I ran 16x12 REAL wheels over my Cobra brakes but had to shave the 'fins' on the top of the calipers for clearance. Just keep an eye on the calipers for 'splaying'. Autox doesn't kill brake equipment like road racing does so I wasn't too concerned about them. They guy who bought my car put Wilwoods on and thats what it came back to me with.......(avatar was a CP racecar before it went AIX)