UMMM...Lizard King ran a 13.69 in his bone stock 2000 GT...that's pretty damn fast.
Mustang92 runs 12.9's in his NA GT. A few cobra guys here and at the corral.net (like jmiers, etc) are running low 12's NA. I dont know of too many people around these parts running the kinds of numbers you're talking about. The list you've already got is damn impressive. Sorry I couldnt be more of a help, though.
BTW, what's your GT running now?
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Black 2000 GT
Bassani X-pipe, Magnaflow Mufflers, Steeda Pulleys, K&N Filter. Steeda Weld in Subframes, Strut Tower brace, Sport Springs, Caster/Camber Plates.