Are there any matching "GM Mark of Excellence" seat belt decals available?

[Green Monster]

I'm trying to match the GM Mark of Excellence decals on my 72 Blazer but the color does not match on the decals I recently purchased. The lower lettering font is a little thin too.

One decal is missing and so I'm attempting to match the other four originals without replacing them all.

From what I can tell the buttons decals on 67 trucks were turquoise while 68-72 were blue.

Below is a photo of the decal I purchased compared to the original button showing the color does not match. Did the color on the original change? Is the aftermarket a poor match (the seller indicated the decal was for 67-91 GM vehicles). Do I have turquoise decals?

Are correct looking GM seat belt button decals available or is this something that needs to be purchased from a used original?