@Tonden_Ockay - Here you go! I hope your friend gets some use out of it. Scaled down to about 75% of what it was with a little more refinement. This should at least be a decent starting point...
Care and feeding: Appearance 847, "Dark Sun: Golden Tower of Tyr". The model base is offset by about 9 tiles because it's not really meant to be in the center of an area but on and edge, instead. You'll see what I mean when you place it. Laying a "wall" terrain on the Desert tile set seems to work pretty well to cordon it off. Also, this should always be set to static, obviously. If you don't set it to static, a little phone will ring on my desk and I'll know.
Otherwise, if you have any quick modifications you'd like me to make (like changing where the model is in relation to the model base), let me know pretty quick (my override folder is like Grand Central Station) with a PM and I'll change it for you.
BTW, the "pro" way to do something like this would have probably been to do it as as a "forced perspective facade", maybe even using some of the original reference art. I was just a little too lazy to mix and match 2D and 3D and I couldn't be sure it wouldn't be viewed from higher-up in game.