You want to look at the Chrome Ivan or the Chrome Pawn.
The Ivan will hold 49L and the Pawn holds 37L. The Pawn can be had for 159.99 shipped on ebay. Also there is supposedly a sale coming up soon for both companies. But its more secretive than Tupacs retirement gig, so good luck.
edit: OHh yea pick up that Fitzroy craiglist buy, that's a great looking bag.