I agree, postage is outrageous !!!
If I understood your earlier post, you said this was for a different project, other than the '90 FatBoy w/Mikuni.
But you wanted the support for Mikuni as well.
How about using that bracket just for a template to have a copy made ??
& If UR getting the bracket made, maybe use good stainless & then you polish it.. Never have to worry about rust..
Or you could paint, or powder coat it...............
When you have it installed (If I could suggest) I'd check the intake then for leaks. Wiggling a carb around & clamping down a new support can disturb the intake seals.. I know, I've had to replace some after an up-grade like that..