Good idea. I would not have known what kit to buy and what you've suggested makes sense for the Pinot Noir. Now I'm excited to try this. It was making me sick to think I would have to throw it out. Now I have a plan. Stay tuned everyone!I like winemaker81's plan. If you grew the grapes you don't want to throw out your efforts; this is a reasonable plan. It should turn out nicely.
I suggest you try a Pinot Noir kit since Marquette is a grandchild of Pinot Noir. The next choice would be the old standby Cab Sav. The Cab will give you a dry, dark berry flavor that will blend nicely with both the Marquette and St. Croix grapes. I think either choice will be a success.
Either way you can buy a commercial wine to top up if you don't have enough for a full carboy. Or if you have extra from the new ferment, save the extra in an smaller container to use to top up.
Let us know what you decide.