I've been looking for luggage for some time and have some Givi cases but no rack. If you have a Givi frame or any other rack which will fit this model drop me a line.
www.triumphparts.co.uk aka Sprint Manufacturing do a Givi/Kappa (they both accept the same cases) fitting kit for the Trident and Trophy derivatives, but it may not be compatible with a Tiger. A phone call or e-mail to them may be useful as even if what they have won't fit, they may know where to find what you need. The high level silencers may be a problem although they must have had luggage systems for them when they were in production. ebay and second hand spares dealers may have the answer. Good luck with your search.