any advice on new leather interior?

Hello, it’s too 4+ months, but i finally got my car back to me in MY. Unfortunately, all that time on the sea has brought on a very bad case of interior mold. It’s so gruesome inside, I should have put up pics for Halloween, but I missed it…

I’m still wrangling with the marine transit insurance co, but there’s a chance they will agree to pay for new leather on all the seats. Has anyone ever worked with a shop to get this done? What I’d like to know is whether I can get good results if I try to convert the seats to the diamond stitch pattern found on the newer S6 models.

https://i.ytimg.com/vi/7Jxpf26JhSg/maxresdefault.jpg