Would love to get a product like these http://shop.grrreatwall.com but bet the shipping to the UK would be ridiculously high. would allow my rats especially to have more time out of their cage as could set it up in any room without having to worry too much about if the whole room was rat proof. have tried wire pens before with gerbils and hamsters and they soon managed to escape either by climbing out or squeezing between gaps where wires had bent or broke. theres some wire runs in the pets shops around here but the gaps between the wires are huge - the boys would just walk straight out! has anyone got any runs they would recommend?