Re: oe swim ladder/oe embelems
A couple of years ago our 1979 18DV was involved in a collision. Since we had the boat in the shop anyway, we decided to restore the look of the hull as much as possible.
Our fiberglass shop was able to order the decal emblems (the US flag and Cobalt logo) and vinyl Cobalt lettering directly from Cobalt. The lettering wasn't the same as the original, it was the lettering used on newer (1980's) boats. It was a more elongated font than the original. The decal emblems matched perfectly. We also tried to order a matching rub rail, but Cobalt did not carry that part any longer. OEM was light blue, and we ended up replacing it with a black rub rail. Our boat originally had a half inch wide vinyl "pinstripe" running around the bottom part of the color stripe, which we could have replaced, but decided not to.
Cobalt's website offers sales brochures in PDF format for many years dating back to the mid-70s, and is a good place to check to see how your vintage Cobalt may have looked originally.