A couple of months ago I discovered that a local supermarket has a dedicated freezer for “odd bits”, many of them with bilingual labels, English/Spanish, indicating to whom they expect to be selling mostly. I have found liver, heart, kidneys there, but also tripe & intestines. And then the “not so odd” odd bits, like oxtail & pork belly. Total accident that I found the freezer; it is in a corner near the meat section, but not particularly obvious.