I was in the Asian supermarket and they had plain bags of frozen kebab meat - lamb. It is already cooked from the spit and is exactly the same as the cuttings you get in a kebab from the shop but for you to make your own.
I just made a couple and they were gorgeous. Wrap, chopped tomato, iceberg lettuce, onion slices, grated carrot, the meat and my own sauce. Loads left for later and cheap as chips.