I was contacted recently by Oomph who who produce plastic cards. I gave them a trial and the results are fantastic. A really sturdy p;lastic card the same size/thickness as a credit card that comes in both shiny and matte. All in all a very cost effective way to make an impact.
Below are an example of cards produced for the very talented Ian Stevenson.
More information can be found here: www.madebyoomph.co.uk