Unless you really want a motor generator, then go for a static frequency converter. Cheaper, more reliable and quieter. There are dozens of good quality units available and you'll find them with a web search.
I understand your point of view. We want to do overload and rupture current levels that will call for 8 to 10 thousand amps, however. Also, the kva is a factor - 300. The static mfrs. hesitate when I give them those numbers.