The original Lanboy has long been discontinued. IDK about the Super Lanboy but it is still on the Antec site. The Aspire/Apevia X-Sonic is about the same as the original Lanboy but IDK if it is extant either (the Chenming 310 series is about the same too if there is an aluminum one too - yes, newegg has it in aluminum and black). Have you tried Froogle? Something like the Lian Li PCI-35 might be as close as you can get right now. Or maybe the Coolermaster Mystique 631 (cheap at SVC.com right now). It may be a bit bigger, but it is light and it's easy to remove the door...
.bh.
PS: I see the Antec B-stock store has some cheap. .bh.