The search function is your friend (found on the forum tool bar just below your user stats)
No worries though, just a matter of getting more familiar with the site. There's lots of flush mount threads in the 2008+ farkles section waiting to be found.
But here's a few links for flushmounts for the front signals that we know work.
DIY - Mod the stock signals to flush: Costs ~$0 but involves some fairly permanent modifications to the bike and your stock signals
http://www.ninjette.org/forums/showthread.php?t=19043
Protons: A bit outside your price range, but they're good signals. The DIY looks a lot more complicated than it really is. I just went overboard because I prefer reversible mods.
http://www.ninjette.org/forums/showthread.php?t=36477
Bikelitez: This set isn't great but it's cheap:
http://www.ninjette.org/forums/showthread.php?t=2098
Associated thread: couple other kinds listed in here
http://www.ninjette.org/forums/showthread.php?t=12454