If you mean by the rear link the part that the bottom of the shock attaches too and connects between the front "triangle" and seat stays, you can buy one new for about $65. I bent mine and had to get a new one.
I've given up on Specialized bike shops per se. I order my stuff from a paddling outdoor shop, Nantahalla Outdoor Center (NOC), in N Carolina.
If you mean the whole rear triangle, I don't know.
Al