First off all there are no working emulators outthere supporting cd images.
Secondly the Jaguar is still a very active platform. PAINTER is just released on CD and more games will be released in the near future on CD. This is why I don't like to idea of cd-images. You can make some for yourself when you own a game. But sharing or asking on a board for them is something I don't like.
Just buy the cd's they're mostly very cheap on ebay and make images from them for your own use.
There is NO real good emulator and Jaguar consoles are also very cheap these days so just get a real machine... is also more fun.