Wicker's is great for storebought. They're calling it a marinade, but to me, it's a sauce. Ingredients are simple: Vinegar, salt, spices.
It's made in Missouri so it may be in the stores where you live. If not, here's their website store:
Pit Beeatch for Team Munchkin
Avatar by Northwest BBQ
"...In nature, there are predators. I believe the common denominator of the universe is not harmony, but chaos, hostility and murder..." Werner Herzog