I don't think Monark had produced any models on their own. ProSwing Golf had their own line of clones (Trident/Heathway), but I don't know if they're producing any new models -- they have the Acer line from Hireko and seem to closing out some of the Tridents. Proseries is the outfit that bought out Geek, they always sold a bunch of clones as well. I had some trouble with them in the past -- I don't think they update the website often, as I've ordered things that aren't available, and they just don't send anything and never email, so you have to go after them. Maybe they've improved -- I just haven't felt the need.
Alpha put out a new line (drivers/woods/hybrids) last year -- Value Golf is carrying them. I haven't tried them yet, they're a little rich for my blood. I never had any KZG stuff -- by the time I discovered them, they weren't selling to hobbyists, and there were plenty of other choices available. Granted, that doesn't mean I won't try one out off EBay if one catches my eye.