I'd think that it would be easier to change the color of your existing forks then to fabricate your way through mounting the wrong forks to your bike. The easiest way would be to remove the forks, tape everything off and paint them. That way you wouldn't have to worry about any heat generated during powder coating messing with the fork internals. I'm sure you could pull the internals out and just get the tubes powder coated though, it would just take more time and cost more.