This is interesting - now when you pull up an item on the website it will offer an alternate aftermarket part if available.
Now normally I stay with OEM parts for everything I own. But I found an exception last year and thought I would share my experience.
I had a gauge wheel fall apart on my 62D deck. I found most of the parts. But after taking both rear wheels off I saw the other one was getting worn also. So I used the parts I had to make one good one and went to order a new replacement for the other side.
So I went to GFP and saw this wheel was $42 - ouch. I had some time so I did some research. I found a Stens brand replacement on Amazon for $27. After reading the reviews I decided to take the chance. When I got it I matched it up with my original and it was exactly the same -no difference at all including the markings on the wheel itself.
So when I saw this email from GFP I had a good example to see if this worked on their site. I pulled up the AM136720 wheel and there it was - an alternate replacement Stens wheel for $19 - even way less money than the Amazon 3rd party vendor.
So one thing I learned was to trust the Stens brand. I have a feeling that Stens must be an OEM supplier for Deere.
I think this is great. Like I said, for most things I will choose Deere parts. But for a gauge wheel the alternate turned out to be a great deal for me.