Some of us wrote about fuji a while back.
No lamb pies, but you may may be interested in the larger diameter pies at Jenny’s Kitchen, which has various deli style wheaten things, including some xian bing.
Again not lamb, Beijing Duck House used to have the puck-like men ding rou bing, but currently lists an item callled 北京炒饼 Beijing Style Cake w.Pork.
ASJ (I’ve not been, can anyone weigh in?) has puck-like beef and pork xian bing and a few other varieties in either mornings or weekends e.g., https://www.yelp.com/biz_photos/GfuVZvOJ0HxMCUChyVaUSg?select=ergBk6g4nhbmiRP8lWDAoQ&utm_source=ishare&utm_content=photo
