RobA
Read thru this thread about Mail Order Trees.
If you google the state nursery you seek, you see what is available. For instance: Pennsylvania div of forestry
A couple of notes: There is very little state nursery stock left at this time of year. Most of them take the bulk of their orders during the fall for the following spring planting season. Secondly, most all the state nurseries require some level of committment to plant the stock within that same state. Take it for what it's worth. ;\)