I was in need of a floor covering for my 86 and didn't wan't carpet due to
the dirt issues.
I found a sample of a product called flexitile at lowes and thought it might
work out ok.
They are 20" interlocking PVC squares, there are ramped edge pieces
available too.  Here's a link to see what they look like in the van.

http://www.flickr.com/photos/9309453@N08/613402477/

I wasn't sure how they measured the pieces so I ordered extra and did the
area between the front seats too.  The stuff cut easily with a utility knife
and I think it looks pretty sharp.  I already hauled pavers and sand and the
tiles wiped clean no problem.  It cost less than $100 to do the areas I did.
I ordered from www.flexitiles.com

I posted this in case someone else was in my boat and for the archives.

Ryan