It's a really simple bike, time for someone like the crew at Urbane or Surly to rip it off. Not to suggest they typically rip stuff off, but there are a lot of shops these days selling asian frames.

I must say I just came off a tour where I couldn't replace even 700c touring tires. I was planing on carrying a replacement, but held out for a Kevlar bead tire, which I never found. I wasn't too worried because the only other tire I had bust previously lasted years after an internal tape repair. So guess who didn't take their tape... 451s would be totaly impossible to replace in so many paces, which does give the BMX sizes some appeal.