Following a spot of research, there's a big Company in Bangers that supplies a lot of supermarkets, Frionor. My Thai reading is rubbish, but they advertise that they supply fish fingers made from red snapper.

Youngs and Birds-eye fish fingers are available in some Tesco Lotus, but where these places are is anyone's guess. I really need to be in LOS, tickling the translator (with the g/f out of town), to get a handle on this but young Joy should be able to manage something for you. Failing that, Thai Google for a list of Tesco/Big C stores and give one or two a call.

That was fun and a very goodnight to you and yours. Cheers