Double seat swivel sliders that will clear thick floor (rear seats on rails)

[meza]

I’m looking for a double swivel seat slider that will fit over the fabworx RS rail system I’ve got in the rear of the van. Flooring approx 30mm, rails approx 35mm.

Any recommendations?

Alternatively, what are the chances of packing under and raising the swivel seat base a tad? Possible to change the seat base studs for longer ones?