the mavic website seems to have only from 1997 onwards in their archives.
there is a section i found for spoke references, in the current tech section. there is a drop down for a 'crossmax' wheel. the codes are thus:
rear drive side, 273 M40021
rear non drive side 255 M40020
front, 255 M40020
all are listed as straight pull, round double butted round head black.
pretty sure this would be the info you need, sounds like a pretty normal type of spoke, you should be able to get something like that from a bike shop, even if its not genuine mavic.
good luck!