Tian Jin Dumplings in Oakland Chinatown (I think this is the takeaway stand you mentioned) has jian bing on their menu, stuffed with youtiao. I liked it but it was a little bready, may have suffered from the ride home. Very large portion and probably enough for a meal by itself.
P.S. I’m not sure a jian bing popup started by a Chinese immigrant counts as cultural appropriation 
