I've never had the B6's clutch apart and it's a different style than the B12, so hopefully someone else has the answer for that.
For the sprocket cover, one from any year B6, 650, 750 or GSX-F Katana 600 & 750 or the old GSXR 750's (91-back) will work, but their paint color might be different. The current one may work fine with the hole in it, but before I rode off into the sunset, I'd observe it carefully while using the clutch and be sure it isn't flexing when you move the lever. Flexing cover = bad.