There are a couple of supermarkets in Sheffield that sell bits and bobs of Filipino foodstuffs:
Central: Tai Sun Chinese Supermarket, 17-19 Matilda Street, S1 3LB
London Rd: Thai Panna, 315-317 London Road, S2 4NG
The latter has the widest range and is pretty good. Also has a website at here
If you'd like to know more, please feel free to PM me.