Originally Posted by
bunyip
As mentioned, check with your insurer/professional representative body's legal team.
If you draw up your own contract, you can make it fit your needs: something which, sadly, a lot of the off-the-shelf stationery fails to do. If you do this, I'd strongly recommend getting it checked over by a solicitor.
I do have something of a concern over your statement/question:
It sounds like you might be sailing rather close to the wind of what could amount to IPR theft, so do take care. :(