Looking for a 9" edger blade with a 1/2" bore hole for my Craftsman 3.5 HP 9" Edger

 
NOTE: I will edit this post to read SOLVED when I locate a new blade. Thanks!
 
I am trying to find a suitable replacement for the Craftsman 9" edger blade with a 1/2" bore hole (Craftsman Part Number 783840-853) for my Craftsman 3.5 HP 9" Edger (Craftsman Model Number 536.772100).

It seems the Craftsman 9" Edger Blade was replaced by Murray Part Number 783840E700, which was replaced by Murray Part Number 740297MA*, which is no longer available.

* I could not find any specifications for Craftsman Part Number 783840-853 or Murray Part Number 783840E700. I did find specifications for Murray Part Number 740297MA: 8.78" x 2.4" x 0.94". Clearly, the Blade Length and Blade Width are 8.78" and 2.4", respectively. The remaining dimension, Blade Thickness, is reported to be 0.94". Obviously, the blade is NOT almost 1" thick.

Jack's "Craftsman" Parts Lookup for model numbers 536.772100, 536-772100, 536 772100, and 536772100, and part numbers 783840-853, 783840.853, 783840 853, and 783840853 yielded no results.

Can anyone help me with this?

Thanks!

Joe