Isn't it much better to have the clean tracks? You can always add effects like wah wah during the mixing of your songs. I googled a bunch of free wah wah VST's for you. Note that I have never used these VST's nor this website before. Just one the results Google came up with.

I recently bought NI KOMPLETE Elements, which among others contains Guitar rig. Here are some fine effects to use on guitartracks and/or on your live guitar. sells for around $99 US.