Can you recommend a dye sub printer for..
Dyesub printers generally need specially formulated media for the dye to transfer properly (the media has a dye receiving layer). Unless you can find dyesub receiver cut in a format to make CD/DVD labels, you're unlikely to be able to print dyesub disk labels. I doubt that you will find a dyesub printer that can print directly onto disks.
When I worked for Kodak on their line of thermal printers, they were experimenting with adhesive backed thermal receiver, so it can be done. The question is whether there is a sufficient market for it for a manufacturer to bring out a disk label product.