This is a sample agreement for fixed price web development work. It's intended for people operating as freelancers. It's on the popular contract by Dan Wong with a focus on web development and inclusion of sections about ecommerce, hacking, revisions and website launch.

Basically, all the areas you will want to make sure to change are contained within [BRACKETS].

As for editing and sending to your client, I'd recommend using an awesome service like Docracy which will allow them to sign the contract online.