[Mgs] Foam for door cap rebuild

[Douglas Gaither]

My daughter just bought her first car - a 1971 MGB-GT.  The driver's  
side door cap was in terrible condition.  Upon removal, the foam  
disintegrated.  From my '66B rebuild, I remember that this was a very  
dense formed foam pad.  Although Moss sells a complete cap for $150,  
they do not sell just the padding.  So my problem now is finding some  
suitable foam to rebuild the cap.

Any idea's out there?