I'm fortunate to be in a city (Houston) that has a number of greek stores, with about three of them that maintain our para.
I agree that if you talk to the store owner / vendor and express your concern then they will usually try to keep our para in stock. Otherwise, I've ordered from the internet and have been satisfied.
I've also gotten para from Chez Poodle - lots of cute items!!
Oh, also, encourage your chapter sorors to buy from that particular store / vendor once they get our stuff in stock. There is one lady, a Delta, here in town that does a very good job of keeping our para in her store - only problem is that she moves the store a lot.