Hmm, I don't see Square releasing these games outside of Japan anytime soon. That's the thing with these 'International' versions, the only one that has ever had a western release was Final Fantasy X. Not only was that only in Europe, they only did that because they never got the normal version of FFX due to how long it took to release the game there.
If you want to play the Final Mixes, just get Swap Magic and import the games. It's easier then it sounds. KH2:FM is the most worth it if you were only going to get one.
"To think that once I could not see beyond the veil of reality, to see those who dwell behind... I was once a fool.." Alexandra Roivas from Eternal Darkness: Sanity's Requiem