The male-female I use are my own design, and I get them machined locally.
If I'm not using the sanitary clamps, I prefer clampco, but there is another good one, but it escapes me. I get most of that stuff through Columbia River Mandrel Bending. Adam Fortier and the boys over there have been treating me like gold for over 10 years. They sell alot of what is needed for fab. Bends, lots of flanges now, reasonably priced collectors,etc.