Many recipes call for this, but we don't eat pork much anymore. I am thinking turkey bacon can work as a substitute, but the texture is very different. Is there a beef "equivalent" or other subs?
I don't think so -- it's kinda about the pork fat. Beef fat is really different (worse imho)
If you're looking for a smoky/bacony flavor, and to avoid meat, try a good Spanish smoked paprika
It's not The Same, but it's something!
I'm totally partial to recipes with a miniscule amount of pancetta/bacon involved -- all flavor, not much of the meat. I use it like a spice, with small amounts stored in the freezer.
No equivalent at all - very distinct flavour, especially if it is flavouring a recipe. I agree with previous poster about beef being worse and can't imagine the terrible flavour of that.