I bought two Securon belts for my VW T25 campervan, 500W and 500/cv, one to replace a rear lapbelt, and one for a rear-facing buddy seat. I can't remember which was which (one has a greater reach). The price was really good, better than the garage had found. The only thing is, for fitting in the back of an old style camper, the length of the belt before the 'socket' part of buckling up means fitting a babyseat is not as snug as it should be. But that's not a criticism of the belt -more a heads up to other campervaners.
Replaced original faulty rear belt with like for like item, so straightforward fitment Kept original buckle the webbing strap was longer then the replacements, however as design was same there was no compromise in safety.