Camaro Central has nice American made ones, great color match and tough stitching, Distinctive Industries makes a beautiful one, in fact the one I like the best for reproduction boots. PUI also makes them, as does TMI, in original and mod styles.
You can also have a local upholster make a custom one not using the factory style clips. There is a thread over at Team Camaro where someone had one made that uses no clips or alterations to the pinch-weld molding. I have also seen ones where marine style canvas snaps were mounted on the molding to replace the factory clips.
Like a lot of people - I only use my factory one for photos, and the reproduction for when in parade mode or someone is sitting on the boot. The Vaseline is a good tip. I don't have my pinch-weld molding on at the moment so clips are mute for me.
