I have seen a lot of "home" fabrication of various little brackets and sway bar mounts etc... and I always ask myself why?? Perhaps it's because people don't know you can buy this stuff ready made -- it's cheap and made well - and.. well.... you get the point.
Paul Horton's Welders Series has frame curves to motor mounts to sway bar brackets....
http://www.welderseries.com/blog/