Don't know if you're still shopping, but I found Niche makes 20x9's in 35mm offset. I was looking at the Niche Vicenza for mine. They are 26 lbs each which puts them in the not too bad category.
Don't know anything about the quality of Niche wheels. My understanding is that they used to be gangster type stuff, but are now getting more into the VIP stuff.
I think the look is right for an MKS, but probably not a SHO. Slim pickings in 20x9's.