I searched for informations about possible software based solutions to correct off-center records, and I found two softwares : Respeed, that is included in Cambridge NoNoise solutions (no price available, but a lot of money for sure...),
and Celemony Capstan :http://www.celemony.com/cms/index.php?id=capstan
Since it's designed to rescue the most valued classical recordings, it could also be an interesting resource in the process of digitalizing any vinyl or tape source, including our beloved Jamaican made records.
It corrects not only wow and flutter, but bigger speed issues, including off center records, probably also issues with warped records, tapes with varying speed (those sound tapes which are slowing as the batteries are low...), etc.
It's quite expensive (just
USD 4458 they say !!!), but it's also for rent at USD 199 for five days.
Now, if someone is about to testing it, I would be interested to hear about the results....