Where the **** can I get a gerbilarium?!?

Please help:( right, ATM I have a thick plastic hamster cage, with plastic sides and a wire top, but now one of my gerbils has jumped up chewed the wire and then fell down and broke her back legs. She is ok now though, she is eating and drinking. So I really need a CHEAP CHEAP CHEAP GERBILARUIM OR FISH TANK!!!! can't find ANY CHEAP ONES:@ I'm stressing, I hope she will recover but I don't want my other gerbil to hurt herself too!:(. ANY IDEAS OR LINKS TO CHEAPPPPPPP TANKS OR GERBILARUIMS! best answer gets 10 WHOLE POINTS:) thankyaaaa!