Sacrilege, I know when we used to shop at Trader Joes they had a list of all the hechsherim on products in the store, which organization they were from, and a contact name and phone number for each one. Ask at the store, maybe they still do this.
I LOVED going to Trader Joes. They had the best chocolate non-fat yougurt – I used to buy it by the case! (It wasn’t cholov yisrael.)