Hinge roller stop replacement (or whatever they're called)
 

Are the little hinge roller stop Buttons that keep the door from swinging shut replaceable without removing the hinge or the pin or the bushings?

AFAIK you need a hinge.

That is the overkill response, I was hoping for a simpler option.

Are you talking about the S springs that hold the door open? If so they are easy to replace and sold at Wilcox as well as many other suppliers. Even EBAY.

I'm talking about the buttons, rollers, or stops that the S Springer rides against to keep the door held open. Both buttons on my driver door hinge broke off. As a result the door swings freely when I'm trying to get in or out of my C4 87 Corvette.