I have ordered knife making stuff from Moonraker, and I'll vouch for Tony Davis: he's a good sort. The last link is well worth a look for really exotic stuff like fossilised mammoth ivory, desert ironwood, giraffe bone and oosik. If you don't know what oosik is ... I don't want to be the one to tell you
Dawkins speculates that we don't have one because of natural selection as good "hydraulics" is a fitness indicator so you shouldn't really have one Rev unless you slipped through the net but you can get one from highlandhorn if you need one.