I'm looking for the treatment that was used in the interior of the 1982-1985 Buick Riviera convertible conversions. These were done by American Sunroof Company. Unfortunately they have not responded to my e-mail. The leather has significantly more shine to it than other interiors. I had some leather replaced on my seat and want to make it look consistent with the rest of the interior. Hope someone can provide this info, I will be greatful.