I've been trying to find one of those for quite a while now. The ONLY one I've seen for sale was on Ebay. It wasn't complete and the guy wanted something like $1500 for it.
I have one and it works great. It is a little finicky to setup but once you get the hang of it it works good. I usually put all my dull bits in a small pail then when there is quite a few in the pail I get out the sharpener and do them all.