easybuiltmodels has some nice tissue, both their own cheaper brand, and the light and strong Japanese Fuji tissue ( but expensive )
They come in some really nice colors, but the shipping cost is expensive. IF you find the Fuji tissue somewhere else, post it here ! as that tissue is super nice, and much lighter than the heat-shrink coverings.
Once you get the hang of it, you can cover a model fairly quickly.
note :- make sure you get the tissue grain going in the right direction... tissue grain along the length of the wing