I have 4 Mokis and love them. Aviastar engines might be an alternative however:
http://www.aviatronics.com/review20.htm Note good review on site by Clarence Lee (from an old RCM article).
They are sold in US by Sig mfg:
http://www.sigmfg.com/cgi-bin/dpsmar...50F.html?E+Sig (and the price is right).