[galaxy-user] bed12 format for stitching blocks given a set of coding exon intervals

Hi Galaxy, I am trying to stitch together MAF alignments for the coding sequence for a few genes of interest in Drosophila. I used UCSC to send the bed intervals of the coding exons of my gene and sent the output to Galaxy. But when I try and use the tool "Stitch Gene blocks" it complains that my bed is a bed3 and not a bed12. I'm a bit rusty with my browser skills, but how can I send my output to Galaxy as a bed12 format so I can stitch my MAF blocks together? Thanks for your help! Amit -- Amit Indap