Try some of these older ones -
http://archicad-talk.graphisoft.com/viewtopic.php?p=32762
http://archicad-talk.graphisoft.com/viewtopic.php?t=3884
http://archicad-talk.graphisoft.com/viewtopic.php?t=1642
Make a comment and bump them to the top again!
Practically speaking I guess the way it would work would be that the override fill must occur on the purely symbolic plan, whilst a section is a 'true' representation of what is actually modelled and therefore must display the fill representing the actual material.
I'm just thinking out loud, but would an extra 'overlay' fill on the section solve the problem better? i.e. Display the original material fill on both plan and section, but have an extra fill with an adjustable origin that could be used to display the coursing. I don't quite know what would happen with irregular courses or junctions with floors, mind you, but that would have to be sorted out with the original wish also!