I was looking for the same thing a couple of weeks ago for an order this weekend. I, too, was unsuccessful. So, I ended up creating my own pattern by selecting a font from MS Office, printing it out, enlarging it, then traced it onto my pattern. Of course, cutting them out in dough was a chore, but I'm hopeful all the work will pay off. If they're decent when complete, I 'll post a picture this weekend.
Anyway, I hope someone comes up with an easier solution, quick!!