Luscious Dumplings Inc.
This is actually the name of a recently opened restaurant in San Gabriel which seems to specialize in soup dumplings. Only got a chance to peek at the menu, and they have several varieties at $4 to $5 per order of 10. It's located in a post-WW II suburban shopping center once anchored by a supermarket but now without an anchor, so you have to look very carefully for it. It's at 704 W. Las Tunas at Mission.