I don't know if its any good, but I've just seen a silver coloured A4 Laminator for £10, plus £2.50 for standard delivery (between 1-3 working days) at the following website:
www.maplin.co.uk/Module.aspx?ModuleNo=-14254&criteria=laminator&doy=25m4
sorry, I still haven't worked out how to do a link 