The last I knew Amcor would still honor a request for a replacement with an original card and whatever the amount is on the card. I've not tried in a couple years but it usually did. Also if you don't have the card you can go to a dealer that might still have the master sets of "keys" ID it and place an order either on line or over the phone. The phone order with "no card" will be substantially more money!
You might try a call or email with a "high resolution" image of yours also. Never tried it!
http://www.amcorlocks.com/order.htm