This the disc brake master cylinder I buy for all conversions.. I also buy 90% of my VW related parts form Jack at Bug Stuff in PA for the last 30 years . https://www.bugstuffonline.com...der-for-disc-brakes/
I also buy from some parts from Appletree VW https://www2.cip1.com/ProductD...ductCode=C13-16-9554