My 2009 Macbook Pro needs a trackpad replacement. It's been wonky for a while now. It doesn't hold the click when I click and drag. The touch "click" holds just fine. I replaced the battery a little while ago and that isn't a problem. I wanted to get the replacement pad from ifixit but they're out of stock. I see some very cheap ones on amazon and ebay, but I'm very sketched out about going cheap on something like this that is an integral part of my computer usage. Any suggestions? Thanks.