not really all new forks steerer tubes are put into liquid nitrogen to shrink them before pressing them in the crowns you might destroy the fork trying to remove them unless you have a bolt on steerer then yes you can
i don't think it's going to work rock shox and marzocchi use different construction methods maybe you can have a machineist make u a new one but i would'nt try to fix it get a new crown-steerer assembly or look for a cheap parts fork all boxxers 99 to 07 have the same crowns