Most of that stuff you can still buy.
Toast Toppers are still available, I can buy them in Tesco, Asda, B&M and occasionally at a local farm shop.
I bought two tins of Heinz Beans with sausages just today.
Angel delight is still available and the major supermarkets even do their own versions (Tesco's version is about 17p a packet but uses artificial sweetener so is bloody awful).
Shippams sandwich pastes are still available in all the supermarkets too.
I have a packet of Bird's Eye potato waffles in my freezer.
Pot Noodles you can buy all over the place, although they are now better for you which of course means they don't taste anywhere near as good.
However, you don't seem to be able to buy Cremola Foam anywhere these days.