http://www.ebay.com/itm/200298858825...84.m1497.l2649
this is what I found, maybe that key you linked is two part and I could use the backplate.
On Bob's link I asked them if its two pieces, and if so to get a pic of just the back plate. The pull part I found looks to be identical to the orig. I may just fab up the back plate based on Steve's pic as it does not seem to have any ornate decoration.