Check out this site.
http://www.discog.info/moroder-computerdisco.html
I'm not sure if there's that remix.
According to what this guys writes,there is a longer version that is clocked at 4'06" than the regular version at 3'35"or 36".
I'm sorry if it is nothing new to you.
Also, what's interesting to me is that the song order in the UK/Japan version is different to that in the US version:
(US) (UK/Japan)
Giving up, Giving in /Giving up, Giving in
Looking for Love /Falling in Love Again
Falling in Love Again /Looking for Love
Did this difference make a lot of difference in those days?