Can you get shelf-stable individual packs of velveeta cheese sauce?

[goddessdawnie]

My husband loves velveeta shells & cheese. I'd like to make up little packets that he can take to work and cook in the microwave, like the individual pasta cups that are available. However, I haven't been able to find it individually packaged and if you open the pack, it requires refridgeration. Anybody know of a place I can get little individual packs of the cheese? (I know I can buy the cheese powder online, but I'm looking for the saucy velveeta kind).