I haven't looked at beveling gears, but if you have a spare basket from an 09 then that would be the first thing I did was that swap.
if that doesn't work then maybe look at this solution that is my current plan to try. Running an oil line to the housing to better lube the gear teeth.
https://www.venturerider.org/forum/showthread.php?119593-YES-WHINE-is-GONE-I-Finally-did-IT-PUT-OIL-line-to-THE-DRIVE-gear-on-Clutch-housing