I'd give these a shot (although I think they're over-priced).
CBR900RR's from 92-99 also used a 45mm fork, so while I wouldn't guarantee a fit, I'd be surprised if the fork thread size and the damper rod thread size were different to the ST13. The missing damping adjusting screw shouldn't cause a leak as the ST13 damper rod is solid; one could add some thread tape if a better seal was needed.
http://www.ebay.com/itm/98-99-Honda-CBR-900-RR-Fork-Suspension-Cap-Cover-Upper-Lids-/162064509921?hash=item25bbcc2be1:g:e0YAAOSw3v5XIpBt&vxp=mtr
CBR900RR's from 92-99 also used a 45mm fork, so while I wouldn't guarantee a fit, I'd be surprised if the fork thread size and the damper rod thread size were different to the ST13. The missing damping adjusting screw shouldn't cause a leak as the ST13 damper rod is solid; one could add some thread tape if a better seal was needed.
http://www.ebay.com/itm/98-99-Honda-CBR-900-RR-Fork-Suspension-Cap-Cover-Upper-Lids-/162064509921?hash=item25bbcc2be1:g:e0YAAOSw3v5XIpBt&vxp=mtr