Here are the zonerects for the old maps:
Code:
<ImageStyle Name="exp09_dun_deepchelsith" displayname="Chelsith: The Ancient Vault" zonerect="-1793.00, -1380.00, 931.00, 664.00" />
<ImageStyle Name="exp09_dun_deepchelsith_solo" displayname="Chelsith: The Ancient Vault [Advanced Solo]" zonerect="-1793.00, -1380.00, 931.00, 664.00" />
The only image we have is a jpg, but all you need to do is save it as a .dds, use same image for both.