Crash bungs?

[oll_loves_pie]

Hey guys, I bought my '03 Fazer and it came with what look to be mountings for some sort of crash bungs. (See round chunk of metal at the bottom right, near the downpipes) I believe that the previous owner took this down the road and then took the bungs off because they looked scruffy. I was wondering if anyone knows where I can get some more? Just the bungs, not a whole set.