Earlier this year, I sold a couple sets of helper spring air bag kits and have just acquired another set.
Firestone Airbags part # 2407
I'm not familiar with Tacomas too much so I can't really say which submodel they fit, but these did come off a 2008 2wd sr5. They've got 68k miles on them and are in great condition. All hardware included. I think it costs roughly $25 to ship depending where you are. Please pm me if you are interested. looking to get $150 + shipping obo.
Only picture i've got of the truck they came off of (truck already went to the auction so I can't get any other pics)