It's in the UK store but I hate to burst your bubble, Chaos Theory is a bad port too, not considerably better or worse than the other two. Well except that it runs in 720P unless you manually disable that on the XMB and the other two don't. To be honest don't bother with it.
Chaos Theory is a much better port than the other two. The framerate is always stable (unlike the others) and the only glitches I had with it were the occasional random quicksaving (which causes the game to pause for a few seconds). Otherwise it looks and runs pretty well.