I agree with slim and jada on this one..
while I have not rewound a stator, I have had my fair share of winding of various electrical components..
the ONLY reason I would do it is to say I did...
and to be honest, without the proper winding machinery, I would expect lots of failures during the process (broken insulation, mis-counts on the poles, ect.) not to mention keeping proper tension is a real pain in the south bound end of a north bound mule...
There is more to think of than just the temp rating of the insulation as well.. it has to be capable of withstanding the harsh environment of hot oil, as well as vibration.