Greetings John,
The Bad News - Unfortunately the part from sears parts is no longer available. I wasn't satisfied with that answer so.
[link|https://www.searspartsdirect.com/product/63dxhsyba0-0071-917/id-401173x004|Sears Part Link|new_window=true]
The Great news - I did source you some used parts you can purchase from ebay that will fit your machine.
[link|https://www.ebay.com/itm/364708841285|Ebay Part 1|new_window=true]
[link|https://www.ebay.com/itm/204128840069|Ebay Part 2|new_window=true]
I hope this helps you out, i am including the diagram for you mower. If I can help out any other way just post back.
Cheers!!
Moe
[image|3302538]