I was looking for a rear toggle pin with the number 59.
I wrote to this company in Germany and asked them. Guess what:
They had this part with number 59!
They are one of the biggest gun part companies in Germany specialiced in old gun parts. For an ADDIONAL fee of 11.00 Euro they try to find a part with your desired 2-digit number. You have only to pay the 11.00 Euro if they have the part.
http://www.asamnet.de/~ehrenred/ersatzt/p08.htm
http://www.cds-ehrenreich.de/
Note: Parts with the note "EWB" are only availible for buyer with a German weapon licence.