Seat Belt extenders for backseat?!

I added an aftermarket back seat cover to my 2024 4Runner SR5. It looks like the rear seat belt
clips are way buried into the seating. Recently took Mother In Law out to dinner with us and as she rode in the backseat without the seatbelt on (because it was impossible to lock the belt) she really slid around as I cornered. (Honestly, I didn't do that on purpose?)

Anyone have a rear seatbelt extender on Amazon they recommend?

 

i really would keep the option of sliding. Now you have that ammo in your pocket for the MIL!

 

https://www.seatbeltextenderpros.com/toyota-seat-belt-extenders/

Maybe these?
It's a good company I have ordered from them in the past and they ship fast.

 

I second the recommendation above for seatbeltextenderpros. Bought some cheaper one first on Amazon and fought with them for several months - it was difficult to get the OEM belt to latch into the extender. Then finally one of them refused to latch at all so I bought a set from seatbeltextenders and they work just as they should. Been using them for over two years now with no problem.