Well, sedums are easily propagated by cuttings, so while I don't want to lead you down a path of crime, perhaps you could take a snip or two to start in your own garden. The Creeping Phlox would be a bit harder, since it's propagated by division, which would mean digging unless you could pull some up with roots attached. Again - not recommending, just musing. . . .
My body is a temple. Unfortunately, it's a fixer-upper.