Does Chef's Warehouse or Albert Uster carry the supplies you need? Perhaps you can find out who is supplying your local bakeries and see if they will setup an account with you?
Have your tried freezing your hazelnut pastes and pistachio paste? I freeze all my nuts and nut pastes and have not had any problems with them going stale or rancid.
If you are willing to come into the DC area upon occasion... I could possibly split some of my stock with you. PM me if you want to figure something out. @lebowits may also be able to help.
