Charman - How soon are you looking to get fruit production ?? The Pa. Game Commission is a good bet if you want the most bang for your buck. I've gotten crabs from them, they are usually a mixed bag of crabs, unless you order American Sweet Crabapple. But the seedlings are in the 10" to 14" category and will take years to produce. If you want fruit in 3 to 6 years, I'd order from Saint Lawrence Nursery ( SLN ) or Cummins. SLN has a new owner, but is already sending out catalogs for 2016. ( Same varieties as the original owner ) I have All-Winter-Hangover, Winter Wildlife, Centennial, Chestnut, Trailman, Centurion, Dolgo, and Violi's crabs from SLN. First fruit in 3 years on some.
Or - since your location is Carlisle, check in with Adams County Nursery over in Aspers, Pa. ( ACN ) ph : 717- 677-8105, e-mail acn
@acnursery.com. Their 2015 catalog has 6 varieties of crabs in it. They are one of the most highly rated nurseries in the whole country, year in and year out.
The other guys' suggestions for grafting are also a great way to go. Then you can pick & choose which kinds you want to propagate. Like NH said above, grafting is a bug that stays with you once you start !!!