I built my own for my JK; I don't have a pic handy on this machine but you can see what we built at this link (Don't feel you have to watch the video, I linked directly to a frame that has an image of the carrier over 3 steps -- the initial start, the frame complete, and then the full carrier finished).
If you'd like more photos, let me know. Essentially it was a single hinge, that was supported in 4 places, and latched on the driver's side. It would hold our full size spare, two jerry cans, and a hi lift jack. I used a DeStacko clamp rated for 2,000 lbs, and cannibalized the aluminum tire carrier mount that came with the JK (which I bolted onto the steel frame I made), but otherwise everything was home made 100% using basic hand tools -- the cuts and such were done with an angle grinder, the metal was bent with a vice and a hammer, etc. The hinge was homemade and could be greased via grease nipples I tapped into the body of the hinge. Also, since I wasn't confident that I would like the design and function, I made it so it bolted to the bumper instead of being permanently attached so I could take it off and modify it; turns out it was a pretty functional design from the start so I never needed that feature.
If I were to do it again I would consider the following:
1) Weight. The tire carrier I designed was very strong, but heavy. I would probably build it the same way but out of lighter materials (like thinner steel or in my case, aluminum).
2) Usable space when open. I designed this one from the perspective of 'carrying' stuff, but when a tire swing-out is open, the rear of the swing out portion can be utilized with water storage, fold-down tables, etc. I would probably do that the next time.
3) Swing Lock-out/open assist. My next one will use a spring-ram to assist and hold it open or something like that. Being able to hold open the swing outs makes a big difference in uneven terrain, especially if you use number 2)'s idea above.
4) Dual versus Single Swing out. The dual swing out is more complex, and its an additional step to mess with, but it puts less stress on the hinges and can help create that 'usable space' at the back of the rig.