anyone know where i can get some plastic about 13mm thick and 100mm or so square?
needs to be un-crushble but not brittle,i seem to remember seeing some in a snazzy shade of blue in the dim and distant past

kitchen plastic nylon chopping board from a pound shop

ebay
http://cgi.ebay.co.uk/12MM-CLEAR-POLYCARBONATE-PLASTIC-SHEET-210-x-297MM-A4_W0QQitemZ130199409596QQihZ003QQcategoryZ26258QQssPageNameZWDVWQQrdZ1QQcmdZ ViewItem
do clear polycarbonate in 12mm

Acrylic (perspex) is available in funky colours and more thicknesses, but is a lot more brittle (though 12mm or 15mm would be pretty tough)

cheers graememk...you are a star