Yeah, it's not really the pudding section - I was trying to think how to describe it. Tescos especially have that kind of miscellaneous dry good aisle, it has the jelly(o) and blancmange mixes, meringue nests, rice pudding rice and such.
Does seem more common for it to be with the nuts and bombay mix etc. though. Might be worth a second look 'cos it won't be a big shelf full. It always takes me two or three looks to find it and I know roughly where it is in my supermarket. I have the same problem with coffee filters too.