Another alternative is to find a Blacksmith, go with all your measurements and you may even find some metal there that will give your bar a different feel, but equally cool. Cast iron for example, or whatever suits you. I went to a blacksmith to get a luggage rack made for my trike (years ago). It had to be easy to fix, look the business cos the trike was a head-turner, and be weather/rough treatment resistant. They were a very reasonable price, friendly, quick, did a good job and i got a custom-made part that was the business.