Have you looked at Tilton?
www.tiltonracing.com
I have their top hung setup and after finding that my Tilton Hydraulic T/O bearing needed replacing, I ended up also replacing the master cylinder so the two matched. The clutch works flawlessly now. I didn't think I would like the hyd. T/O but my mechanic has one in his racing stock car and has had zero problems with them leaking. They have many options for master/slave setups. Go to their website and poke around. Make sure the master matches what they recommend to go with the slave bore diameter you have. Their tech people are real helpful too.
Good luck.
Paul