I suspect you're posting in the wrong forum, unless you're looking to buy / sell them
Secondly, assuming you're talking 2001-05 FZS1000, it already has cartridge forks, so you wouldn't need cartridge emulators. Racetech do however sell revalve kits for the 1000's forks.
I've had good experiences with Racetech stuff in the past, but very few (if any) UK owners have gone for their FZS1000 fork option. Most seemed to have gone for K-tech valving which on the face of it seems more expensive. Then again, US import tax and postage charges might mean prices would end up virtually the same.
A better place to search would be the American based FZ1 owners association board - if anyone is likely to buy 'n' try the Racetech valves, their forum members would.
http://www.yamahafz1oa.com/forum/