Tale a look at the Filson Field Bags http://www.filson.com/232.HTM or http://www.filson.com/230.HTM, if you are wanting something to go with a nice suit than I might look at the Leather Field Satchel http://www.filson.com/252.HTM .

Of course if you want something really nice take a look at http://www.tannersalleyleather.com/index.htm they are a small (about 4 craftsmen) shop that makes really nice stuff. I think they will even make to your design or requirements.
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When the wolf attacks he will find that some who run with the flock are not sheep!