We often get inquiries about footprints for older tent models that are no longer available. Here's a good article from Backpacker magazine on exactly how to make your own, including putting grommets on it:
http://www.backpacker.com/gear/11204?page=3
Also, please see this website as an option for those who are looking for footprints for tents from past seasons. This company makes their own versions of our footprints themselves.