Herb & Matt bought the Cheverra back and did a thorough restoration on it from 2009-2011. It is/was supposed to be featured in Hot Rod as part of a "where are they now" article. It was this same car that appeared on the cover of Hot Rod in July, 1980. The car is for sale - sit down before reading further - I think the asking price is $60K.
Matt says he know the whereabouts of a few of the Fire Am's he & Herb built over the years. A buddy of mine is hot on the trail of the last one they did (a 1991 T/A), but the trail has gone cold. My dream car is the '79 Fire Am that Herb campaigned in that years 24 hour race at Daytona and Cannonball (both were DNF's).
He procured a 427 Chevy for the '80 race season to replace the SD455 but suffered a string of DNF's under Chevy power as well. The photo in my signature below is of the car in this configuration broadsliding at 70 mph at Watkins Glen in NY with Herb at the wheel. Interestingly, despite the poor finishes the car got more attention than those he was running against and served it's purpose as the test lab/promotional tool for VSE, Herb's mail-order performance parts business.
I am currently working with Herb to reproduce many VSE parts. My hope is that we have them available for the 2013 T/A Nationals. Herb has the sway bars (front & rear) & solid frame bushings done and is currently working on the interior roll bar and 180* headers. I post updates here on TAC as I hear from Herb.
You posted you want to buy a Fire Am, but bear in mind that Herb actually built very few himself (>10). Most were done at home by DIY enthusiasts who ordered parts from VSE. There's no reason you couldn't do the same with your own T/A. Herb is alive & well and on his way to having genuine VSE goodies available. If you'd like me to add you to our mailing list, PM me with your contact info and wish list and I'll let you know when we have the parts you want in stock.
Also, keep searching online. There is a TAC member who found a gorgeous '76 at a Buy Here/Pay Here used car lot in PA (!). I think he stole the car for what he paid and it's an absolute time capsule. They're out there - whether you build it or buy it, having a Fire Am is very attainable...