Now... I found mine on Amazon as well... the John Deere Corn Head Grease that is. The John Deere dealer gave me that 'Deere in the headlights' look too...
and they brought up an old guy (like me) to the counter that grinned and said... 'yes I've heard of that but we do not have any in stock'... it's been in my steering gear box for 18 months and is great. So my vote... Amazon.