S&H Hardware on Castor Avenue. They seem to magically have every random thing we've needed over the years!
Jack A. replied:
G.M. Deck and Sons Hardware in Ambler.
Cynthia R. replied:
Try Melrose Hardware
Eric K. replied:
I would try Melrose Hardware (445 W Cheltenham Ave, Elkins Park, PA 19027) judging from what I have seen in there before you hike out to Philadelphia Salvage. I must say Philadelphia Salvage does seem like the place you are sure to find this, although it may be still attached to an old window.