And also, kind of related, Knifeworks is going to become the sole seller of Ritter's knives...
Yes, that's correct, KnifeWorks is going to be the sole source for Ritter knives. I noticed sometime this week their website began taking pre-orders for some types of the Doug Ritter Mk1.
For the Doug Ritter Mk4 Gentleman's Knife -- a variation on the Lone Wolf Paul Presto -- Aeromedix remains the place to call. The person I spoke to at KnifeWorks this week didn't know anything at all about the Mk4, while Aeromedix told me they have just two more.