I am most likely going to do it this way:

http://www.1000rr.net/forums/lounge/56168-do-yourself-abs-repairs-cheap-solution-fixing-fairings-2.html

Only problem is, I know using acetone or other solvents for welding is a problem because it creates air bubbles in the plastic as it hardens and drys. Problem with that, its in the hinge area so that can weaken it enough to re-break you think?

Also what brushes or spout style bottles would be ok with acetone sludge? Almost need 3D printers to extrude new posts. And just use ABS glue to insert the post onto the original plasic, and use a bit of acetone to soften the replacement post to insert the brass ring. That would be ideal.