: Many "Carnicerias" carry beef tendon (often labeled as nervio de res ) alongside other specialty cuts.

: A clever "pro-tip" from enthusiasts is to visit a local Pho shop and ask to buy extra portions of cooked tendon directly—a great shortcut if you don't want to spend hours simmering it yourself. Online & Farm-Direct

If you can't find it locally, several high-quality ranchers ship frozen beef tendon directly to your door.

: These are the most reliable sources. Look for chains like 99 Ranch Market , H-Mart , or local spots like Lion Market or Maxim Market . They often stock it fresh or frozen in the meat department.

: A traditional butcher shop may have them in the back or can special order them for you if you ask in advance.