looking to cook ribs in the slow cooker

I usually do ribs on the grill and oven, but want to do them in the slow cooker. I have the seasoning down. I hit it with weber rib rub, and conventional seasonings, but what I want some tips on is what you put in the slow cooker with it. I dont want to use traditional barbeque sauce , but have never made my own. What do any of you with experience with this put over the ribs in the slow cooker ? TIA