I could not find a retail source for a Big Mig 049 so went to the NV engines web site contact tab to inquire regarding availability. I received a quick email reply from Mr. Alex Frisch, NV rep. I could have ordered from the web site, but Alex provided order information for purchase by personal check at my request. I received the engine within a week of sending the check as well as a delivery follow up email from Mr. Frisch. The site offers tech support and parts order support as well.
http://www.nvengines.com/ I was pleased with the response I received from NV engines.

Joe