You won't be able to find any that are EXACTLY like the razors in the movie because those were made especially for the film. Tim Burton worked with prop master David Balfour to create a set of unique razors, and several sets were created (a few for the film, one for Tim, one for Johnny, etc), but they aren't being sold commercially.
I did a few searches on eBay and the only ';ornate, engraved'; razors I could find had plastic handles. I'll provide a link just in case you want to take a look.Where can i find a sterling silver barber's razor like johnny depp's in the movie sweeny todd?
try ebay or a antique dealer. salon supply stores willl not carry anything ornate like what you are looking for..