I bought my last one from Summit.
https://www.summitracing.com/parts/luk-lsc190
Several companies make them Dorman, etc...
Mazda B2200 86-93 0.70" bore (works well with a .75" master cyl.)
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I also bought a Beck Arnley slave (does not fit) as I wanted the shaft assy out of it. Much nicer than what I currently had installed.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1