Vintage Synth Repair

OK, I realize it is not a "synth" per se, but we have some old
Ward Beck console modules we want to mount up and use, but
they have big giant old school edge card connectors. My
question is, does anyone here know of a supplier for larger
size edge card connector sockets....I think you guys should
know what I am talking about (i.e. more like an ISA card than
a PCI card....)

I know I needed one for my mellotron a while back and was
having trouble finding them....and ended up just getting one
from Streetly.

Also, what is the correct terminology for edge card sizes
besides pin number? Like is there some parameter that
describes the "size" of the card or the pins....like is the
bigger edge card connector like an "eighth inch pin" or
something like that? Or in other words what am I "searching" for? 

Much appreciated,

-brendan