Try the Hayabusa forums
If you "google" the make model and year of your bike, followed by "fairings" or "bodywork" you should get a few results
Some will be forum threads
Some will be OEM dealer parts
But there are a whole host of Chinese body kits now
Especially for an "older" model
(I found some for my 1989 CBR RR NC23
)
So finding replacements for yours should be easy
A lot are for sale through ebay
For track use and as aftermarket fittment for road bikes
A wide variety of paint schemes and factory replicas
But many of them come in plain colours to affix your own decals
Or even plain white for your own custom paint finish
But check out what the folk on the forums say about the kits
There are usually a few threads about them
Regarding fit, finish and general quality
I'd say joining a forum is your best bet in the first instance
I'm sure there will be a "dedicated" forum for the Hayabusa
It has a section of its own on "Fireblade.org"
Good hunting
Em