Close to where I live, we have a Butterfly farm, who also have Lizards, they breed all sorts of thing, including Locusts, give the a ring, i'm sure they'll help, its.
Tropical Wings, 01245 425394, they may have a website, stick the name into google an see.
Once went into a friends school during the holidays to feed the animals, and the locusts had escaped and bred- there were thousands of them in the science lab and we had to call the council who came and sprayed them, as they are a notifiable pest if they get out.