If I understand the nature of the problem correctly: You have a
3 phase unit and you wish to use it on a single phase circuit
(commercial/industrial vs. residential power). I am not familiar
with that unit but I suspect that the motor may be the only thing
which is 3 phase in the unit, with the rest 208/230 volt single
phase. If so you will probably need to buy a single phase motor,
have it replaced and the wiring checked for proper tapping on
the transformers for control voltages etc.
As you are not electrically inclined I would recommend you find
someone who deals with motors and motor controls to do the work
for you. There are probably some shops near you who specialize
in motor rebuilding. They usually will give an estimate for a
nominal fee, but you will probably have to take it in to them,
if they come out the cost increases substantially.
Dan Wellman PS If you know the hp, voltage, rotation (e.g.
Clockwise Shaft end), frame size, mounting, shaft size (dia x
length) type (keyed, flat etc), amperage, model #, manufacturer,
if a high starting torque is required, etc you can probably
find a single phase replacement motor from WW Grainger etc.