OP here - thanks for sharing, didn't know that! I found a source (below) that confirms that Acme is the source of the smoked fish, and claims that Acme works w

OP here - thanks for sharing, didn't know that! I found a source (below) that confirms that Acme is the source of the smoked fish, and claims that Acme works with specific delis to make custom lox for each. So the Russ & Daughters version may still be specific to that shop, even though it's all made at Acme originally (and they do ship nationwide: https://russanddaughters.goldbelly.com/ https://russanddaughters.goldbelly.com/). https://www.myjewishlearning.com/the-nosher/the-secret-behind-new-york-citys-best-smoked-fish/ https://www.myjewishlearning.com/the-nosher/the-secret-behin...