72hardtop

I was looking for some help on finding the correct 1/4 molding plastic clips for my '73 Omega. I also have own a '72 Delta 88 with the same 1/4 molding and I believe the clips are the same. On the attached picture, my clip is on the right, the replacement I purchased is the green one on the left.

But the new ones looked too wide right from the start, and when I tried to reapply the molding today, I could not push the molding onto the clip. Does anyone know where I might be able to purchase the correct clip?

Thanks in advance for any assistance.