S-E-F plastic, factory GREEN color, if indeed they exist.
I've seen those for the HK33, I'd rather have one for the G3.
Don't need a clip/pin job, but I'm not picky.
I fix the radar you'all try to stay under...
The only green plastic lowers for a G3 I have ever seen in the US were the ones that came with POF virgin G3 kits sold by POF-USA way, way back.
POF might have had them as parts too, IDK, but they aren't very common at all anymore.
I don't think they were SEF, picto maybe.
MKE has made green lowers also, you see them on their HK33's, not SEF. Don't know if they made them for G3's or not.
I don't think what you are asking for exists, at least I haven't seen it.
I know, a rainbow unicorn item.
I have plenty of metal ones, thanks anyway.