Are the dinette seats sideways facing or front- and rear-facing?
I fitted extra belts to our rear-facing dinette seats without much trouble because there are unused mounting points in the original cab floor. The front-facing dinette seats have brackets passing through the floor, bolted to the chassis.
As to fitting belts in the rear lounge, I decided I wouldn't want my children protected by a 2-inch wall of polystyrene and wood if someone ran into us from behind!
There are lots of belts available on ebay but I did in fact buy some from a scrapyard because the lengths were important. Now that my children are a bit older, growing out of seats with harnesses, I am about to change the belt arrangements and I know a friendly auto engineer who loves a challenge!
