What you could do is get like 2 thousand big supers from Mulberry Farms (because they're on sale right now and 10 bucks per 1k is a good price), pay the horrible shipping, and then breed your own. Not much work except for having to separate them if you want them to pupate well, and they grow somewhat slow.

Just a thought. You could try just getting some from Petco to start, but with so little, it'd be a SLOW start.