I think you have invested so much time and work that in the worst case scenario you should just opt for another wheel and finish in time even it is not just exactly how you want it. For us voters a different wheel/tire wouldn't matter that much, considering the interesting frame and all the details on the bike.I am absolutely beyond angry. The morons at Gap30 bicycles screwed me on my front tire. After sending a 451 that was (and still is) advertised as a 406, they promised to get a new tire and measure it before sending it out 1st class mail. They sent the exact same tire as before and it was not sent 1st class.
I haven't given up, but the chances are slim to none of me finishing by the deadline.