Nope, this is where us yerfies are SOL. There are nice tubular chrome-moly blanks up to 44 inches that are widely available in either plain or key-way. From that point though, you've gotta figure out how to get sprockets, brackets, bearings and hubs on them. I was thinking about this issue last night. One thing i may look into is thin wall DOM tubing of 2 to 2.5 OD. If i can find some lightweight saddles and bearings big enough, it wouldn't be too hard to put a brake and sprocket hub on something that size and keep them concentric. For the wheel hubs, i'd cut off the splined portion plus some extra, weld that into a nice fat spacer that would fit in the end of the big tube and get plug welded in place. The upside would be a pretty much bulletproof axle. Downside is i have no idea if the parts i imagine even exist ....
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