I found some replacement Zastava M57 Replacement Grips and I wanted to share my experience. I ordered, they shipped the next day and were delivered in four days.
It took more time to take off the original grips then it did to install these grips. The mold has inserts on each side that slide into the open gaps in the frame. It looks in very easily and the version I have in question have a nice beaver tail to it. It finds my hand perfectly now. I'm not normally a guy that likes finger grooves but these are well done. A nice subtle touch is that the bottom of the grip comes out just a little to grab your pinky finger. The Beaver Tail fits seamlessly which is quite impressive.
I haven't shot it yet but I'm very excited for the next range trip.
And to answer your questions ahead of time, yes, those are custom night sights I had installed along with removal of the mag release and a trigger job. Although the trigger still has a fair amount of pre-travel but the pull and reset are crisp.
Grips can be found at
RazorArms. I bough the version on the far left (G20A).