[balderdash]

you might also try Costco if you are in the US. Anecdotally, a friend of mine is a supplier for Costco on the food/beverage side, and told me that they did more diligence than all their other customers combined.

EDIT: you might also just try going direct to small suppliers, a lot wineries also make olive oil

https://winecountrytable.com/travel/other-activities/six-son...

[gnicholas]

It's tough to buy olive oil at Costco because they sell big containers, and good olive oil goes rancid before many people would be able to consume it all.