I watch this girl's make-up videos often:
http://www.youtube.com/user/Michelle.../1/-bjOB4zS0uE
Found a video she made of how to make your own pore strips - you just use a tbsp of milk and a tbsp of unflavored gelatin, microwave it for 10 seconds, let it cool then apply it to your face with a cheap foundation brush that you don't really care about and peel it off when it dries.
I wish I had some unflavored gelatin at the moment. Facial products hurt/burn the hell outta my skin, and pore strips ARE expensive, and I soooo want to try this!