I still use Birds powder and it seem ok to me. I've never made 'real' custard with eggs, and neither did my mum who was a cookery teacher!
The thing I miss is blancmange powders. I used to buy Brown and Polson, either in the mixed flavour packs - reaspberry, strawberry, chocolate and vanilla - or the packs of 2 raspberry flavour, but can'r seem to find them any more. Tesco do strawberry flavour in single packs but I really liked the raspberry and chocolate flavours. As a child I was often given what mum called 'pink pudding' - a bowl of hot raspberry blancmange - which I loved. Anyone know where I can buy Brown and Polson blancmange powders?