I was searching the internet the other day for reasonably priced NOS Campy C-Record Toe Clips (Since I seem to bust one every other week) and found this website, Ochsner International
which has a grip of NOS Campy replacement parts, including one of the coveted 50th anniversary Super Record Gruppos up for sale. They have C-Record toe clips for $10/pair, which is quite reasonable and actually cheaper than new MKS clips.
Further searching brought me to this eBay seller, who has 25 pairs for $87.
This could be a worthwhile investment for me..