Here’s the link to the one I recommend for all our clients. I’ve got the “word” version of if if you’d like to amend it for your own use. Just email me and I’ll send it firstname.lastname@example.org
It includes information for both installers and transporters, plus shows specific insurance requirements. Historically, transporter/installers have purchased poor/inadequate insurance that excludes damage to the home that they cause. It’s important they have the proper coverage.