where to buy air line and fittings

[danheit]

Hey guys, just about have everything pieced together for my rear air ride setup. Dominator 2600 Bags are currently in place (gonna see how they ride before I buy front bags, maybe swap out for 2500's), I just picked up 8 SMC 38" valves (used but in good shape - $50!) and the valves came with a good bit of the fittings I will need to put everything together. Also picked up a vintage air pressure gauge on ebay for $5 from a 1940 GMC Bus. All I have left to do is run the wiring, mount my tank (old fire dept SCBT) and run the air line. I am looking to go with 1/2" line since that's what most of my fittings are for, and am trying to find out where the best (read CHEAPEST) place to get decent line by the foot. I am looking for just some plain black DOT 1/2" Nylon line, about 25' of it. I have seen pricing all over the place, and have found it as cheap as .58 per linear foot, but $12 worth of line was $12 for shipping. I might also need a fitting or two to get everything finished off, but nothing I can't work around locally. Where are you guys getting your line? Is there a difference between the Airbagit line vs. other? Vendors, please feel free to chime in here too! Thanks!!