I might be interested in doing this, it looks like an interesting building. What's it from? I have extensive knowledge of Maya as well as importing/exporting stuff, but I haven't played with UT3 yet. Could you give any details on what you mean by UT3 specific? Couldn't the mesh be made in Maya then imported into UT3? Anyway, I've got some time available to do this in, I've done something reasonably similar here
Portfolios | Environments | levelrender
Give me some details regarding what reference you have available for this model, so I can gauge how long this would take me.