You could get a Mark, Hobby People sale them in the U.S.
http://www.hobbypeople.net/gallery/214218.asp or the David Patrick Moodel's version
http://www.davepatrickmodels.com/frame.htm . I guess it depends on the Nitro content you like. To bad they are not the prices of the 80s I belive these are both MOKI engines.
Greg