Hirobo Shuttle Z-TS Engine to Clutch Fan Question

I recently Purchaced this Heli and have a question on how to join the engine
to the clutch fan assembly.  From the directions, it looks like there is a
bushing that is needed.  I have a MDS engine that has such a bushing but it
is too big.  Any suggestions on where I can get other bushings in different
sizes would be appreciated.


PJ