I would have thought that it would be cheaper to run it with a phase converter than to rewind it. It is possible, in some cases to convert a 440volt three phase to 240 three phase by separating the middle of the "star" connections and extending the coils out to the junction box. A star wound motor has one end of it's three windings connected together, each of the three windings are 240 volt, the sum of any two of the windings gives 440 volt capacity. I'm sure that a reputable re-winding firm would be able to tell you whether they could convert it to 240 three phase in vu to running a phase converter with the added advantage of speed control!
All the best, Matthew.