My Engel fridge is on the floor behind the front passenger
seat.  Since I've given up that floor space anyway, I'd like to add
some storage under the fridge, raising it up a bit.  Dimensions: H20"
W24 7/8" D14 1/8".  It stands on four shallow feet that fit within a
rectangle about 10" by 22".

I'm looking for suggestions for that storage.  It'll have to be
front-opening or slide-out, since the fridge will sit on top.  That
rules out the cheap storage bins I've seen.

The fridge is secured to the seat belt anchors.  I'd secure the
fridge to the storage with straps and then secure the whole assembly
to the seat belt anchors.

I'm not much of a woodworker.  If I were, I'd consider building a
cabinet, but that might be heavier than other options.

Here's one idea.  Storables will cut down posts to any height:

http://www.storables.com/Shop/Shelving/Steel-Shelving/

Then I can slide a storage bin underneath the fridge.  Or use the
Storables 18"x24" slide-out basket, which is 6" tall.

If I use one basket, it'd raise the fridge about 7".  If I use two
baskets, it'd raise the fridge about 13", which means the top of the
fridge is almost exactly level with the top of the closed sink cabinet.

That'd add a lot of really helpful storage, and I don't think I'd
miss the floor space.

Other ideas?