PEC-12 is non damaging, archival, film cleaning product and the best
option we've found. Used in conjunction with PEC pads (very soft lint
free disposable wipes) we've found no better product for cleaning film.
It's not cheap but a little goes a long way.
If
you're desperate for some, fast, Nu-Lab have it here in Melbourne
(well, sort of in Melbourne - it's well south of what I think of as
Melbourne proper).
However if you can wait a few days, these guys are much cheaper: