THoeler, sorry you missed out on mine. Philly is a bit of a drive for you, but a couple years ago I bought some parts from this yard
http://www.centurymotors.biz/. He had two 67-72 trucks there, IIRC both were auto. He is an old car yard, he doesn't send stuff to the crusher, so hopefully they are still there. He may be able to sell you a x-member if you can't find one here.
I bet one of the big parters like Randy/teeitup can hook you up too. The one I just shipped weighed in at 17 lb with the box, so shipping shouldn't be too expensive.