Doesn't superdropdowns make a 31.8 bullhorn? I think its around 100 dollars though.... Last one i saw was at a korean webstore....
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http://bikeisland.com/cgi-bin/BKTK_S...ils&ProdID=358

I know they arent black, But 10-20 dollars at the local blast shop will easily blast this to a nice raw, And from there you can prep it yourself.