1979 GMC 3500 Door Panel nuts

[TaosDoug]

Where can I source the four nylon slider nuts that hold the bottom of the door panel? Do I need to make do with some random nuts that fit the slots? If so, any advice as to what works best would be very much appreciated.  I'm not anxious to buy and try a dozen or more in an effort to get one that works, which I had to do with another, but very different, elderly Chevy.

Thanks.

[bd]

Door panel retainer

[TaosDoug]

Yay. Thank you. I looked at Classic Parts previously, but guess I didn't know what to look for. Like you said. It's difficult to know just how much you don't know. :-)