You're looking to put in like... a tongue-and-groove hardwood floor? Are you going to put in a nice bookshelf, too? Maybe a planter or two would liven up the cab.

Snark aside, hit Home Depot and pick up the cheapest discounted chintzy floor you can - that stuff tends to be thin and particularly easy to install (though it makes real carpenters cringe). OR you could try for some kind of laminate or wood-patterned tiling.