$1,234 · Wanted ! A small pickup truck with a power tailgate

Maybe you know someone who could build me one or have an existing truck already with a power tailgate you might consider selling ? I run a small used appliance business and I am looking for a truck with a power tailgate with around a 500 lb. lifting capacity. This picture says a thousand words but ideally I need a smaller scale size one to mount on my 1998 Toyota flatbed. Any ideas or skills to build one ? Thanks