OUR Hobby Lobby has apparently gone TU, perhaps related to the sale of Kavan to SIG. At that time, Graupner sort of went to "Graupner USA" or something to that effect. You might look at Central Hobbies in Billings, Montana. They might have a Japanese or Euro product like that, but I'm not saying they do...just a good place to look.
Steve
Edit: I looked at the MPJet website...some good and useful looking products there. I know Carlson engines in AZ carried/carries MP Jet engines, and I would also ask at Hobby Club. It might be they would know how to get the MP Jet stuff, because they carry Czech stuff. The alternative would be to ask Igor for some help.