Hourly contract agreements

Hey! So, I'm switching over to an hourly agreement with my client rather than our initial fixed price (3 month) agreement. However, I don't have any contracts for this type of thing as I've always worked fixed price agreements. If anyone here has any Hourly agreement contracts that they'd be willing to share that would be super awesome! My email is: pblogsltd@gmail.com. Thanks in advanced, and of course I will change it to suit my specific clients needs but a template would be a major help.