You can get frozen Xiao Long Bao delivered from XCJ in Bellevue. https://thexcj.com/

I've been told they're the same dumplings they use in their restaurant. I wouldn't say they're AS good as Din Tai Fung, but they're super good. I know people might be dubious because frozen dim sum is like...desperation level quality. But this stuff is probably only a step or two below Din Tai Fung in restaurant and you can make it at home.

My only gripe is they use a local delivery service and they are ALWAYS late. They're supposed to arrive by 9 but they rarely ever do. Once they came at 1 AM. I am not a night owl. So that is problematic for me. But it might not be a big deal to most people.

They'll text you when they drop them off so you can bring them in ASAP.