Uh, you want the Japanese extended cut? It's only three minutes longer and it's been so long since I've watched the original version I'm not even sure what the differences are anymore.

As for Friday The 13th, the first one is available in it's fully uncut form in the UK.

Is that all? Aw crap, I thought it was longer than that for some reason.

As for the first 'Friday...'. I have that copy, although I'm sure I read somewhere that although the UK cut has more gore than the American R-Rated cut, there is also an Asian version that is completely uncut, I can be and probably am wrong though.