Also try Toronto Cat Rescue. http://www.torontocatrescue.ca/store/index.asp
Have you checked the shelters in your area? Ask your vet. They may know of some rescues that deal with Manx. You won't find a reputable breeder with mixed breed Manx.
Assumptions do nothing but make an ass out of u and me.
We can stick our heads in the sand for only so long before it starts choking us. Face it folks. The pet population is bad ALL OVER THE WORLD!