Aftermarket Z1 Master Cylinder and Caliper

Any thoughts on these reproduction units?
In need of them and thinking it may be easier to just use aftermarket rather than source, buy and rebuild genuine parts?

I have an aftermarket master cylinder on my KZ1000. It works fine. I can't speak for the caliper quality from experience, but I have never had a bad part from Z1 Enterprises and they sell the calipers.

I also have a couple of used MC's and calipers that I've rebuilt. It's not difficult but the MC's sometimes need to be re-sleeved, although I've never had to do one.