Seatbelt extender

I need to get two seatbelt extenders to help my girls buckle up in my double cab, they're in jump seats the the buckle part is to "wiggly" for them to push the blade into it. I see there are several rigid extenders on the market, but they are sold as type a or type b. Has anyone put these or something similar in a Tacoma?

 

I had the same idea for my daughter- she was having a hard time putting her seatbelt in, but she seems to have it figured out now.
I have an old seatbelt extender from when we had a Prius that I would have used. It fits the front seats, but not the back seat belts.
So, I guess I don't have much advice other than make sure you get extenders for the rear buckles, not the front.

 

Did you ever figure this out?