The way I've scored my kegs for keggles was going to a local craft beer brewery and seeing if they have any old "to be recycled" kegs that they don't use any more.
Or you could check out the few online places that sell the completed keggle which are quite expensive.
Drinking: Strawberry Rhubarb Wheat
Conditioning: Nothing :-(
Primary: Nothing :-(
Secondary: Nothing :-(
Planned: PBC Stout v2.0