Dear group

I'm exploring different grape varieties suited to the Texas hill
country around Austin and have read on Jack's site indicating that the
mustang grape makes a pretty good wine if processed properly. Anyway,
the plant is present on the property I'm trying to buy and figure it
certainly has survived what ever challenges are present on that
property. My question though is there a source of Mustang Grape wine
that I could give it a try? I hate to have a hundred rooted out
cuttings without knowing what it's going to taste like. Can it be used
as a root stock? Maybe I'd graft a cabernet to it if it didn't work .
.. .

Thanks, Chris