I do the same thing all the time. There is a company in Auburn Washington that make and sells Super Hitch. You actually change your reciever to thier double tube recieve hitch. They make extensions as long as 42inches, this is measured from the new truck reciever hitch. That length, added with the hitch and ball and your perty close to 50inches out. They were originally built for the truck/camper people that haul horses. Lots of tounge weight but they needed more distance out back to compensate for the larger campers that overhang. So along comes the Super Hitch. With weight distr. setup, I have a 15,000 lbs. draw and a 1500lbs tounge weight. And I can take my truck and jack knife my trailer and still have another 2ft of clearence. I can off load my ramp and my sled without any issues.
Good luck
E