Alot of our tuners up north will work with you internationally, postage might be £25 or so.
Interesting as a modification, but Jasil state no changes in mass, I'm still tempted with one but unless this 'Racing' style crank is lighter, you are better off having the Yamaha crank built with a forged rod, you would have to try really really very hard to blow the bottom end apart on a DTR.
These Yamaha cranks are solid from factory, any crank will be balanced.
Will be interesting to see a comparison.