One thing to consider. That paint from John Deere is very high quality paint. I've used JD "O.E.M." paint on several occasions. It's good stuff. Seems like it was/is PPG with Deere's label.
The paint you get at TSC is ok, but not all that good compared to what's available. It's NOT very UV resistant. Reds, blues, yellows and orange colors will "chalk" or start fading in 2 or 3 years. If you're putting forth much effort to restore or prepare whatever you're painting, that short lifespan isn't what I want. I've painted a few tractors with TSC's paint. Results were good at the moment, but 2 years later, the paint looked dead. (and YES, I used plenty of hardener)
Also, try any GOOD hardware store that sells "Rustoleum" products. They have a good industrial yellow enamel. We use it at work to paint scaffold handrails. (Ours comes from Home Depot usually)