24V Battery Packs

I'm after a few 24v battery packs (sanyo NiCad preffered) to use as a somewhat temporary measure. Anyone got any kicking around which they may wish to either loan me or sell me? Six months really just until one of our team has another visit to the states.

Can make do with what we have but it would be nice to keep all the robots ready to drive rather than just display. (Specialist parts for WBC now made and ready to pick up so should be at Barnsley subject to getting ones backside into gear on all the robots!!)

Andy