I'm not sure what you mean by 3rd party.
There is rental information, including a list of off-site rental companies, with phone numbers in list 2 of the disABILITIES FAQs thread. It is near the top of this board or you can follow the link in my signature.
All of the companies listed will to live her to your resort. Some of them are allowed to drop it off and Bell services and the others are not.