Ben,
Great question. I immediately tore a new pair of bibs and was saddened by it, and after 4x attempts of someone trying to repair the material (which I'll call 'spandex'), they haven't held up. The 4x were my wife at the beginning, REI specialist, and 2 seamstress shops in San Francisco.
My thinking at this point is to get a new pair of bibs, or jersey. I did keep my Gore bibs and wear them MTB'n under shorts for comfort.
Living in SF, I'd be curious if you do find an awesome seamstress (not sure if that's the correct term these days?) to stitch your kit.
Eric Linser