Paul,

Are you 100% stuck on a tomato based sauce? I mean there are a
gazillion sauce recipes out there that do not require tomato. (The
Carolina style comes to mind right off the bat.) Your best bet might
be a mopping sauce!

At any rate, here's one from my book to start you off.

Texas Hillbilly Mop Sauce

INGREDIENTS:
2 cups vinegar
1 cup olive oil
2/3 cup Worcestershire sauce
1/2 cup water
2 lemons, pulped and cut in half
2 tablespoons hot sauce
6 bay leaves, crushed
2 cloves garlic, minced
1 tablespoon paprika
1 tablespoon chili powder

PREPARATION:
Place all ingredients in a large pot and bring to a boil. Remove from
heat, but keep warm.
Mop every hour.

Pete
From Recipes, Rubs & Sauces.. http://www.thekingofbarbecue.com