Any restaurants sell frozen dim sum?

Are there restaurants or distributors to restaurants that sell frozen dim sum like xiao long bao or shu mai?

In the bay area, steaming up the frozen dim sum from Dragon Beaux/Koi Palace tasted just like dining in (probably because the restaurant also just steams it up to serve).

I saw the post here about frozen dumplings and tried out Siu Lap City's – they're so yummy! Thought it was worth asking if anybody knew of any other hidden menus out there.