Dumpling wrappers -- Chinese wonton or Japanese gyoza skins are the same thing -- are now widely available in the frozen-food section of most markets. From the book "Mad Hungry" by Lucinda Scala Quinn (Artisan Books).
Shrimp and Chive Dumplings (韭菜虾饺)
Shrimp and Chive Dumplings (韭菜虾饺) My freakin favorite Dim Sum Deliciousness. I was Asian in my past life. Straight up!