While not 100% certain, one Spaniard told me you should be able to buy this product in the pharmacy too - which really surprises me.

Pectin, or the Sure-Jell (as known in the USA), is something you mix with fruits to make them firm, to help them stand up, to make them more "spreadable". Is that correct? My parents and grandparents always made jams and jellies from their own fruit plants/trees but I never knew how they did it.