Unfortunately I don't have any New Old Stock seals to share, I'm impressed that you were able to find any at all. I would like a new set of seals, as mine leaks in many places, but I'm worried they would be too expensive for me to buy if a company did reproduce them in a limited run. I've tried to add an additional seal on top of the existing seals in the places where they are leaking, but I haven't had much luck with that technique. I wonder if the original drawings for these seals exist in a drawer somewhere at GM or at the company that bought Cars and Concepts. I found this tidbit today on the internet, I wonder if there's any chance that this company has the Cutlass convertible drawings in a box somewhere in storage, doubtful though.
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Cars and Concepts, Inc., was sold to Masco Industries in 1992, and became known as MascoTech, Inc. MascoTech began buying up other companies in the automotive field as well as other industries and became an amalgamated company offering many products and services. The company changed its name to MSX International, of which it is known today. MSX recorded revenues of $1.4 billion USD and employs 14,000 people worldwide as of 2013. The company is based in Taylor, Michigan.