There are quite a few options and there are pros/cons. The FWC and ATC are probably the lightest-weight. The Northstars and Hallmarks are popular and have more space. Phoenix specializes in customization. Sun-Lite is another wood-framed option. The FWC Fleet (in NothingClever's post above) is wider than the other compact truck FWC's--it's probably close to the same width as the wood-framed campers. The other FWC's are more narrow-bodied.
A new camper wasn't an option for me so I browsed Craigslist for a while. I found a $500 Four Seasons (no longer made) that I could re-model and modify to my liking. It's wood-framed, but it's roomy and has worked out really well for me.
I saw you're interested in off-road ability in your last post. You might want to look for a Tacoma with the TRD-off-road package (look for the decals on the bed-sides like NothingClever's truck, above) It includes a selectable differential locker in the rear axle that makes a big difference with traction in tough spots. With a button push, it locks both rear axle-shafts together so that you get full torque to both back tires (in low-range only). The TRD-sport package includes a rear limited slip differential that is helpful but doesn't have as much of a traction advantage as the locker, off-road.
I have an automatic, ratcheting rear locker (Lock-right, by Powertrax). It gives you the traction advantage but takes a little while to get used to on the road. It is probably the lowest-cost and easiest-to-install aftermarket locker. The Toyota TRD locker, however, normally operates like a regular, open differential with no handling draw-backs until the button is pushed.
Fresh paint:
Eric