I have a Power Support brand trackpad film set for a 15" 2006-2008 MacBook Pro (core duo or core 2 duo models). It has two parts, the trackpad and button portion. It came with two of each, but I only ever used one set on my MBP - it lasted 5+ years without any problems! I sold the MBP a while ago, but just found this in my office...

http://farm8.staticflickr.com/7231/7311454802_b33e506c3b_b.jpg

$7, including shipping. Paypal or EMT.