Working on a solution to do this for those who need it using 10.6.0 or 10.6.3 retail DVD media. If there is any interest perhaps I can post a how to...
I don't know of anyone with the 10.6 restore disks. Have you heard of Apple selling then to owners of a 2012?
I have a question...why?
Do you want to use Rosetta/PowerPC apps?
For me personally - just to see if it could be done. I see so much conflicting information on the Internet about it - some say the 2012 models had a firmware change that was enough to "break" Snow Leopard, but that did not seem to be the case (and I wasn't expecting it either.)
I thought if there were enough intersted people that need Snow Leopard to run legacy applications and PowerPC applications then it may benefit them.