He definitely is still in business, at least as of a month ago. I just received some T/E equipment which I am sure he is gonna want back. I have worked with him on numerous suppressors and barrels for almost a decade. Communication is and has always been his weak point, but he has always followed through. It seems the business is mostly him and maybe his brother, so communication is difficult. However he always does what he says and does it well. Be persistent and you will eventually get through to him.
That said I also might have a spare brake, but I would have to check the caliber. PM me if you are still looking.