where can i find a magic stones? i need it for weapon upgrades..

You can card level 1 or 2 cards into Magic Stones, if I'm not mistaken.

Most enemies that drop M-Stone Pieces will drop Magic Stones once your party's average level is between 20-30. Otherwise yeah you can card mod Grat, Jelleye and Buel cards (all level 2s as already said and pretty easy to get).

Several of them can be found in Squalls ass.....noting his personality of course.

i think that item is super rare any idea where i can find it??

You can't get it until quite late into disc 3, so if you're not that far in the game yet you won't get them, but quite a few enemies around Esthar drop them towards the end of disc 3.

I believe the "elnyole in disguise" after Esthar is overrun will give you moonstones if you mug him.

Otherwise, he usually drops energy crystals.

Since you had two questions of a similar nature, I merged the two together.