I am looking to replace some silks that I bought from Bob Sanders. Has anyone taken over his business since he died?
I am searching for solid color rectangle silks, size: 4" by 36". They fit in a thumb tip. I only have one in reserve and I would like to stock up.
Does anyone have a source for silks that size?

No one has taken over Bob's business to my knowledge. Bob was winding down the business as his supplier was no longer wanting to hem or screen the silks. His silk was all 5 momme so that is what you will need to look for.
I can make silks in 5 mommme but I do not like to. As you know it wear out or the fibers shift pretty easily especially in a thumb tip. I prefer 6 momme but that would be a lot to get into a thumb tip.
Good luck. I can't think of anyone that would have his old stock in stock as that is not a real popular size to stock.