The Dumpster Mutt is a sweet knife, no doubt.
At this point, if you wanted to get one you'd have to find it on the secondary market (bladeforums.com, ebay and so forth).
The Scrap Yard Company has a rather unique way of selling their knives. Their method reduces cost to give us the opportunity to purchase the very best for a very reasonable dollar amount!
Check out
this thread, it should answer your questions.
But as of now, there are no knives available from the company direct. However, you should check this forum often over the next couple of months... there is sure to be something new coming, there usually is. <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />