KBA OC200, IT8.7/3 standard on a creditcard

Hi, I´m new to the printing business and have some problems with colors. We print on wooden cards, both on the wood directly and also on plastic laminated wooden cards.
As I understands it we need to make a ICC-profile for the different cards to compensate for the natural yellow color of the wood. To do so we need a IT8.7/S standard chart, the problem here is that we need it creditcardsize!
Do any of you have a suggestion on how we should go about the problem or can we make a small testchart ourself to create a ICC-profile?