Here are a couple pairs of Brooks Bros. tassel loafers in shell cordovan from a seller who spells it "cordavan". One pair is new, the other looks like it was worn a few times at most.
Size 11 C, brand new
Size 11 D, barely worn
Great price on both. (And sorry if I'm blowing up someone's potential snipe.)
Edit: As Flimsychicken says below, the 11 D ones may not be cordovan, investigate more before buying. The 11 C say "genuine shell cordovan" on the sole.