Broad blade putty knives often work. You can fabricate a "V" shaped tool using plastic or thin wood. I think our club has an electrical workshop in Covington this Saturday. Feel free to join us and we can swap lies and eat donuts. I can check to see if I still have a door panel removing tool. Use to do it for a living.
these are my door panel tools. i have used these little christmas trees before also by cutting the tops to fit in the panels or gluing the tops to the panels. they are commonly used to hold splash shields etc on modern cars they come in different sizes
Mitch, Thanks for posting pictures. That's exactly what I meant. Bye the way, most old timey auto upholstery shops probably can sell you the clips so no need to wait for the mail from LaBaron-Bonney.
Wow, thanks for the invite. I need to slow down and attend some of these functions, this is the third time folks have invited me from this area in Washington State.