Seating rail clip

[Bob Bob]

Hi,

We have just managed to lose one of the clips which fit in the seating rail. The spring holding it has already gone missing when I bought the van so it was easy for it to get knocked out, and it seems after a busy weekend with the kids it's got lost!

Does anyone know where to get a new one? (Can't see on the forum shop.) If they are the same across all vans, as I can see some on eBay, but not sure of the OEM number.

And most importantly, we like to travel with the children as far forward as possible, do people know where the base of the seat is inside the rail (or under the front of the seat? An inch back?) To know what positions the seat is secure in?

Thanks