Hi Diablo
The crash bungs are standard Yamaha. Part No: 5LV-W0741-00. I think the price was about £75.00 at the time of purchas in 2002. It is possible to find an accessories catalogue in any good Yamaha dealer or perhaps on Yamaha uk website. They do work. I have seen evidence on other Fazers. They do not damage the frame as some cheaper models do.
Regards Mike