I just bought a female pinstripe off of a guy yesterday, she is about the same as yours. 2-2.5 years old, 3-3.5 feet long and weighs 998 grams. He said she was eating 2- 3 mice a week. I'm gonna try rats next week, maybe you should do the same? I'm not sure maybe someone with more know how can chime in but I would try small rats. I'm having heating issues myself...
Good luck with everything, hope it works out for you.
Jeff