Oil Cooler O-rings?

I have finally gotten around to removing the oil cooler. The heat exchange element is good, but the 2 larger o-rings came out in pieces. My questions is where can you get the o-rings without going to the dealer? Everybody has the gaskets, but nobody can locate the o-rings.


The cooler came out with no problem. I just disconnected the steering arm. My mechanic buddy said to remove the motor mount and at first I tried that. After looking at the floor jack next to my face and realizing this could become a long visit to the emergency room. I went with disconnecting the steering shaft. These trucks do not have airbags so no problem with that issue.