Just spent a few minutes going through the Hitchcock's online parts book and they list the 350 & 500 brake shoes as the same parts number.
On the upside, the 2010 Classic had the same parts number rear brake shoes.
So next step send off an email to the dealer with the specific part number.
Hoping that puts an end to this post.
Please feel free to throw out any place you folks get your parts from .....just in case I'm still looking come Monday night
And for what it's worth, could not find any brake part number 144570