Very nice. Plastic card is something I never seem to be able to get my hands on, where's the best place to find it?
I pick up my plastic card from a local DIY store (old advertising material - usually thrown away) or from a reclamation site in Worcester called the Worcester Resources Centre (WRC).
You can also try Home Depot type stores (Homebase in the UK) and look for No Smoking signs. the plastic is good quality and usually costs less than buying model making plastic card.
In summary - it is out there and usually available for free or at very little cost - you just have to be on the look out.
Good luck.
Tony