I got some Radians Moulded Plugs from Steve at ADVMOTO today.
They are snug fitting (obviously, as they are MOULDED to your ear) :laugh:
Come with easy to follow instructions for the process, an online video too if you need to see the applcation process before you start,,,,
And boy, they really block out the noise 
I have them in curing as I type this & I can tell you, I can hardly hear the tapping on the keys they work that well,,,
Will give my opinion in a day or so after I have worn them actually on the bike .
Cheers