hello myguel,
i dont have an answer to your query but i suggest you get the ready made "burong isda" or "bagoong" as we call it. Its sold at the Filipino souq. It may not be as good as the one you had in the Philippines but it still is good with rice.
If you have a filipino friend, you can ask them to get you one if they go back to the country for a vacation.
cheers!