<p>Its not quite the same as plasticard but its a lot cheaper and readily available in decent sized sheets. I bought a trade pack of 3'X 2' 2mm sheets from Saffron Plastics - something like 20 sheets for 80 quid a few years ago. The trouble is they may have gone out of business. I did get some once from a vacuum formers, who sold me a few sheets from stock.</p><p>One thing to watch though, the High Impact bit is rubber added to the Polystyrene, so it doesent bond quite as readily as Plasticard - you just need to wet the mating faces to get a bit of a melt before joining and running the joint. I've had better results with the EMEA solvent than MekPak. </p><p>Having said all that, I need large, but simple, buildings to fill the layout space and its great for that</p>