okay...i know where you can get a lot of power sources...you just morph that big tank thing in gongaga to get them...hope i helped somebody...but my question is where can you morph/steal or any other way for other stat sources?

<font color=red face="comic sans ms">From about halfway into disc 2 onwards, you can go to a place where every enemy can be morphed into a different Source. Once you have the submarine, go to near where the submarine docking location is near the Gold Saucer, and go underwater. You should see a sunken airship (the Gelnika). There are 6 different enemies to fight in there. Some of these do have damaging attacks (2000+ HP damage) so be careful.

In the Gelnika you can find Yuffie's ultimate weapon, Conformer. This is very useful for morphing; at a high enough level this will cause 9999HP damage per hit with the Morph command. Once you have the Conformer, you should be able to get sources fairly easily.

The enemies morph into these sources:

Unknown ~ Power Source
Unknown 2 ~ Guard Source
Unknown 3 ~ Magic Source
Serpent ~ Mind Source
Bad Rap ~ Luck Source
Poodler ~ Speed Source

Easy. :D