Adding Lab colors to swatch - not implemented - Workaround?

Dear all

I tried to add a LabColor with an Illustrator script.

function addLabColorToSwatch(L,a,b,swatchName){

var color = new LabColor();

color.l = L;

color.a = a;

color.b = b;

var swatchgroup = app.activeDocument.swatchGroups.add();

swatchgroup.name = "test swatchgroup from jsx script";

var swatch = app.activeDocument.swatches.add();

swatch.name =  swatchName;

swatch.color = color;

swatchgroup.addSwatch(swatch);

return true;

} 

addLabColorToSwatch(1,2,3,"test");

The script crashes on the Line  'swatch.color = color;' with "Error 1202: Not implemented"

This seems to a bug. I allready filed it. I'm asking if anybody has a workaround.

Thank you very much

best regards,

Alexander

PS: Original discussion: http://forums.adobe.com/message/4986457#4986457