Originally Posted by northwind

http://www.motosliders.com/
http://www.rg-racing.com/

GSG Moko do great bungs, but I'm not sure if they work for the K6. JHS Racing used to do really good ones too, but not any more. (Loads of people still recommend the JHS ones, not realising they're not the same)

I use Motosliders, myself.