Rhododendrons are quite popular in the Philadelphia area and suburbs. My landlord has one planted in the flower bed in the front of the house where I plant my herbs. I don't have a specific seller name either, but maybe that will help you locate one.
If there is such a thing as ghosts, then my fathers shade must be spinning like a top today. I am now the proud owner of three gallons of over-ripe, frozen, vinagery, persimmon. Once it is fully cleaned they should complete my shopping for tree and ornamental seed for give away this winter.