I would say lay in the seat next to you, we do that, but I bet you have already tried that. They are far and few between, but I have seen one stiff extender years ago. Either that, or Im mixing extenders with teh school bus
seat belts I have seen... If I had my smart, I could help more. Can you post a pic of the seatbelt extender you havein action, hooked to the female end of the seatbelt?