Around here, you can pick up a Chinese type 56 for about $300-350, if you know the right FFL.
I never found a scope mount that was satisfied with, but some people have been happy with the ones you described. It might be good enough for a red dot or something less geared toward long-range accuracy and more for easier target aquisition.
Honestly, i am confused by the folder stock + scope combo. To get much out of a scope, you need a decent cheek weld or ability to hold a steady position somehow; i can't imagine a folding stock being optimal for that.