Help needed! Looking for a Front Vender Lock for a Mills FOK

[tsparts4u]

Hi,
Can anyone help me find a lock for a Mills FOK front vender casting?
I know that this lock isn't easy to find, but would appreciate any leads on who
could possibly have one for sale other than Steve S. I can't afford to give up my
right arm to get one, ha!
Regards,
Jerry (tsparts4u)