Looking for Shanghai Pork Buns - DTW

During a trip to Shanghai in August I think we had Shanghai pork buns at least three times. We loved them, the process might be boiling then baking as they had a texture that you poked a hole in the top to release the steam. Possibly could be called xiao long bao. I have been trying to find them here but without success. Tried what I thought was something similar at Cheng's but was actually not at all. Any suggestions? A trip to Windsor is not out of the question.