...and oh, by the way, the guy who runs C&M (Chris is his name, I believe) spent some time on the phone with me a couple of years ago, and is (as you would imagine) pretty knowledgable about these pumps. Moreover, he can point you to the people that have one in stock. He was happy to check records for me, and told me call XYZ company, I just shipped them X units...
It's always nice to chat with knowledgable people who don't find it a bother to explain and talk about their products...