http://www.nzmaths.co.nz/sites/default/files/Numeracy/2007matmas/Bk4/MM%204_11.pdf. Each 'house' was copied onto a different coloured paper, and then cut out and laminated. I didn't cut them out again after laminating, as it made it easier to punch a hole in the corner and thread a ring through (are they 'magazine' rings?).
I started off using a whiteboard pen to write the digits directly onto the laminated charts. However these digits are often hard to rub off, especially if you wait too long and it has the chance to dry. So now I use a packet of playing cards (50cents from the local emporium) with the picture + '10' cards removed. Affordable, and much quicker than making digit cards myself. There is a previous post on here with a similar idea.