Buy a set, make copies, sell the first set. Trust me, it will be cheaper and easier that way.
Using some left over 3/16th we had from a bumper fab, a MIG, various drill bits, a vise and a BFH, while using the TJ bow brackets as a basis and some pictures of the LWB brackets from online, we were able to cut and grind, weld and grind, drill and grind, then use the vise and BFH to bend them to the shape I needed. They aren't pretty, but they work just fine. Besides, they are covered by the roll bar padding..
Took about an hour to make and install them. Anyone with fab skills should be able to accomplish it. The TJ bow brackets, upside down and on the opposite side, are about 1/2 inch too short coming out of the padding, but damn near a perfect fit. In a pinch, I would think that you could use the upside down/opposite side TJ bow brackets without the padding on your roll bars. It may sag the back a little. We had though of cutting off the 2nd hoop on the Tj brackets and trying it, but decided to just make a set.