Hey GreyDawg,
I looked around and can't find my receipt from Lowes so I don't have a part number.
It's probably buried in the ever growing pile of paperwork I'm collecting on the conversion.
If you go to the Lowes flooring section they had a small display for
Flexi-tiles and the rubber mat samples were there. They are 1/4 inch thick and made from recycled rubber. The mats are not listed on the Lowes web site.
For the floor ridges in my van I measure from about 2' behind the drivers seat.
With the tape measure up against the drivers side wall the center of the ridges are at:
11-3/4", 17", 22-1/2", 28", 33-1/2", 38-3/4", 44-1/4", 49-1/2", 55-1/4", 60-1/4"
There is some slop in those measurements but for screwing down plywood they should be good enough since the width of the ridges will act as a margin of error.
I'll be laying the plywood at right angle to the ridges. Doing it this way will require a extra sheet but it's not a big expense.