Crash bungs

[mtread]

I've got a foxeye that has the genuine Yamaha bellypan, and uses the Yamaha fixing kit just like with the full side panels http://i948.photobucket.com/albums/ad321/budgiemurray/2013-07-13090926_zps28f04fc8.jpg.
Looking at Yam photos, the crash bungs replace the grey holding plates.
Q1 Can't find the genuine Yamaha ones anywhere. Does anybody know whether any of the other makes are straight replacements using the same mounting through the hole in the bellypan ? What about the R&G ones ?
Q2 Looking at pictures of the Yamaha ones, if they replace the grey plates with a bolt through the middle, it looks like they bolt onto a bracket rather than the frame itself. Is that going to take a whack OK ?
Ta

[mtread]

Bump - Any ideas anybody ? Bike fell off the sidestand recently, and as a 'design feature' with the factory bellypan fitted, the sharp edge slices right through the bottom hose 
Keen to avoid a repeat.