I cannot find 'cook at home' poppadums anywhere. Used to be in most supermarkets. I used to buy them all the time. I go to my local Indian shop for them sometimes but they've usually only got flavours I don't favour. The ready made ones aren't as nice and are usually in a load of plastic non-recylcable packaging which doesn't please me either.
I don't mean products that have been discontinued a long time ago, more so things that still exist but you just can't buy anywhere from recently!
Own brand coffee creamer is another one. Don't use it myself but I've heard people at work saying this often.