yeah i stumbled on the this week to get AP lines for friday. You can still get single card but they don't make it east.
http://www.drf.com/products/questionaire/
it will ask ?'s about how often etc. Choose the derby or big race option. Then you can get to a screen that allows you to purchase a single card.
don't know if this direct link will work but here it is. They are 2.95 though.
http://store.drf.com/acb/stores/1/Si...P1607C1037.cfm