I have not had a chance to fully vet this site, but take a look and see if it works for you.
Link: https://www.legalcontracts.com/contracts/service-contract/?loc=US&pid=googleads-servag_us-ServiceL2_dza4-ggkey_Freelance%20Work%20Contracts&gclid=Cj0KCQjwgezoBRDNARIsAGzEfe5q3u7eDw8LdBlvNGzgKAopWr115EMBQmAuIM4GTrcy5B4u2qR_G-kaAjfJEALw_wcB