Hi...

not single serves but convenient.. look at mainly greek or continental delis, you find "toothpaste" style tubes of mustards mayonnaise etc, also have look through the asian supermarkets specifically the japanese and korean ones as they love small sachets and tubes of condiments... if you want individual serves of meals like meatballs in sauce, premade meat curry etc check out a korean product by "ottogi" they are like MRE's and cost around $2 each (i place the sachet in the water as i boil it for drinks, decant some water into a stainless steel double wall wide mouth food jar from ikea, place cous cous in that, close the lid and wait 10min) make coffee etc, refill water and boil again for other stuff, meal pouch is now very hot and i add that to the cous cous and eat...
"Leggos" makes sachets of pizza sauce you can find in supermarkets, safcol makes a portion pouch of salmon (usually in a sauce), spam "singles" were around for a few years but dissapeared (btw plumrose used to sell a foil pouch 8 to a pack long life hotdogs they dissapeared too), simply slice spam then vac seal individually just before trip..
oh.. asian shops often have small ham/chicken sticks, also a fish stick version.. there is also a individual portion packed long life hard boiled eggs (shell off or on).. actually walk through any asian supermarket with an open eye and mind and you can find heaps of stuff... (on one trip using mainly asian ingredients i made a version of bouillabaisse)
You could also take the Chinese sausage lupchong.. that lasts for ever... any way... i've probably digressed too much...
