that is a section you can replace- you can one-screw the 2 bolts that hold it onto the front cylinder and the bolt on the joining flange. it should just pop off, but be careful with the bolts into the cylinder- you don't want to damage the threads on the aluminum cylinder head!
I don't know if you can get a separate piece from a stealer, but try a breakers- sv 650 might fit!
I like the freezing option but it might just bend the rest out of shape
but as frez said,
Worth a try before you pay for a replacement or for a professional to fix it.
did the same thing to my ybr 125 custom when I went for a bit of an adventure.