Hard to find Mac wrench I need to complete a set from my late father

[bull]

Hey guys, I know this is a long shot but I figure you've all got lots of tools laying around and I'm looking for one to complete a set. Not to get all sentimental but my dad, who passed about this time in 2006, was a Mac tool salesman when he first moved from Iowa to California and met my mom. One of the tool sets he bought while working that job back in the mid 1960s was a 3/8" to 3/4" flex combination wrench set and when he died I inherited it. He didn't buy a huge number of Mac tools while working for them so I'm trying to hang onto them and take care of them. Problem is that flex wrench set was missing the 1/2" wrench, Mac CHLF 16.

It would be one of the "Sabina Line" tools which means it will have two horizontal lines down the length of its back side to designate that it was made in Sabina, Ohio. Not sure how long Mac Tools were made in Sabina but that's the vintage I'm looking for. I've included an auction link and pic of a 14mm flex combo wrench on Ebay right now that looks just like it. If by some slim chance one of you has a decent one, and it's not destroying one of your sets or ortherwise disrupting your life, I'll gladly buy it from you.

http://www.ebay.com/itm/Mac-Tools-14-mm-Swivel-Flex-Head-Combination-Open-End-Wrench-6-Point-M14CHLF-/400373365208?pt=Motors_Automotive_Tools&hash=item5d381cb9d8&vxp=mtr