1998 Renault Scenic Rear seat belt anchors

Interior problem
1998 Renault Scenic 32,000 miles

My rear seat belt anchors are so deeply set in the seats that trying to lock the seatbelts into them is a daily battle. I have three children, all in the correct safety seats but are there any extensions that are legal to use or is there a possibility of getting new anchors that will be raised above the rear seat level, allowing me to spend less than 15 minutes each day battling with the damn belts!

Thanks for any advice