That seems really strange to me given that the stator is basically a four pole magneto (a magnet moving across a coil of wire inducing a current) with one of the poles as a timing reference. I am wondering if IAME changed something in the design from the old white connector style to the new purple connector style. On other side, maybe something else in the circuit is causing a short in the stator. Have either of those engines had other faults or failures? Maybe a poor ground somewhere? Bad grounds tend to overheat circuits and cause all sorts of havoc. Just trying to wrap my head around the cause of the failure.
Is there a fellow racer that might let you borrow their Stator to test. At $200 USD, would be worth it to know before hand if it fixes the issue or not. I think you will find most Karters are willing to help or at least to the point of improving the size of the field. If nothing else, a shop should be able to help troubleshoot the issue for a fee.
On a side note: At one of my early races I was having an issue with my starter relay/solenoid and a fellow racer was kind enough to loan me a spare for the day so I could race. I respectfully returned it at the end of the day and made a personal vow to pay it forward. At the club level, there are not a lot of vendors like you might find at higher levels of competition, but some times a Team or two might be able to help and plenty of folks that have been in your shoes willing to assist where they can.