Quistgaard Desk hinges  

I recently purchased a Quistgaard desk with a hinged top gallery in very good condition, except for the fact that the three table top hinges are broken. Apparently someone flipped the gallery over and leaned on it, breaking the hinges. The original hinges measure 1 3/16" (30mm)wide and 2 1/2" (64mm) long when opened. There are plenty of 1 3/16" (30mm) / 2 3/4" (70mm) table top hindges available (same design as originals and holes line up), but I can't find any hinges 2 1/2" (64mm) open measure. Any ideas??

Thanks for your help,
Mike