Ta.You can make your own lactose free "buttermilk" by adding lemon juice 2-3 teaspoons to your soy or other LF milk. You can use Apple Cider Vinegar or cream of tartar in the same amounts if you don't have lemon handy.
http://www.godairyfree.org/Recipes/Milk-Subs/Baseline-Buttermilk-Alternative.html.