Do you have any kind of ALE/FLX files, if not the negative could be logged on a Keykode reader. Was the original offline transfer done without stopping? Is there burnt-in keykode or timecode visible in rushes? Is there a punch hole on the first keykode? Etc, etc…
Picture should be no problem but sound will need some work. I usually conform scans in Baselight at 25fps with a PAL reference (1:1), after rendering to DPX for filmout or DCP you have an image sequence and fps won’t matter.
Do not allow any cutting in the negative rolls until this is all cleared out.
Dirk DeJonghe
http://www.postproduction.be