Remember, there is nothing in that area that is ZR-1 specific. Meaning it's mostly just heavy duty C4 parts back there. The most common of all Corvette's.
I'm not from your area, but it's hard to believe there's not a Corvette shop nearby. It's in the heart of NASCAR country.
Talk to the local Corvette club, they'll know who the best mechanics are.
I know how it is to feel frustrated when you may not have the tools, or place, to start tearing it apart yourself. But whatever the cause turns out to be, do yourself a favor after it's fixed....drive the sucker. That's what it was built for.
Good Luck