This is not directly the answer to your question, but... you can use the cover from a 1989-1991 (ish) CBR600. Should be much easier to find. Fits straight on, all you need is to change the screws on the inside (it uses 4 screws, you need two of 600's originals for it to work or they are common/garden metric screws) this will be apparent once you open it up

It has the added small bonus of (imho) looking better, and if you are into that sort of thing, it will slightly increase ground clearance too.
Cover for 15$ on eBay