Where can I buy a lift gate for a pick up truck?

If you really plan on throwing ~1000lbs in that little truck id honestly get a set of helper springs or a set of bags like adam (Boxersix) said, we had an older f150 that we threw a set of helper springs in and made the truck handle almost ~1000 more even towing… You might be better off getting a small 5X8 enclosed trailer

Edit* They say you truck can handle up to 1200lbs… with the lift gate and one machine you’ll be pushing that limit, and wont take long for something to fuck up