Very hard to find one, new or used. Coleman only has one now days. It is a pretty good one and worth considering. Also there is the Petromax style. There are several clones of the Petromx being sold new these days.
Petro cloneThat is one. A few members of the ICCC have them and like them. I have a clone with a different name. Could have been built in the same factory or of some of the same parts and I like it. They, generally, are considered a bit more finicky to run than a coleman and not as safe. But I consider both of those properties to be in the head of the user. They are different. ( but man do they have a lot of impressive chrome )
Used kero burners are hard to find and usually bring a premium. But a 200A can be converted pretty easily with new parts from either Coleman or Old Coleman Parts. Or the same parts put into a 242. I have converted a 200A and also a 220E. Hardware store kerosene costs about the same as Coleman fuel. So far the only pump kerosene I have found is $6/gallon. It burns good, is not as clear as the Hardware store stuff.
Randy