Where would be a good place to buy quality U bolts. I'm going to have fun getting one of these off without breaking them to get the correct measurement. A torch would be best but I don't have one. But, I have plenty of Kroil. Which worked wonders on the trailer hitch mechanism. Axle is a solid forged one piece and I don't know the year or make of the original camper. Just have the frame now to make a utility trailer out of it. What companies have good stuff?