It's mentioned on the Wiki, but I don't know how canon it is. "The Empire is also a proponent of human cloning" Oh, it's in a Newsletter too.
http://us2.campaign-archive1.com/?u=dcbf6b86b4b0c7d1c21b73b1e&id=f72c0f91b2
The context here suggests (to me) that this is more in the "spare parts" sense than the "sixth day" brain upload sense.
After all, if such tech existed, why the hell wouldn't the fricking Emperor have a new body by now?
Just say no to cloning as an excuse for respawns