I did some surfing for you. Try these:
Cheata Outboard Motor Brackets
PO Box 1234
Hobe Sound, FL 33475
Manufactures outboard motor brackets that fit beach cats. Propels to speed in excess of 6 knots using only a 1.2 HP outboard -- Provides safe, sure momentum against currents -- Makes docking easy when winds are becalmed -- Motor and bracket weigh less than 17 lbs -- Install in minutes -- Removes in seconds for racing -- Both sailing and motoring positions clear the boom and tiller.
I don't know if they are any good anymore, but you can try. Try our website some time www.tcdyc.com
I am Hobie17 there PM me with user name if you join.
Hobie 17 # 007
Soon to be Mystere 4.3