Ebay? Someone probably made one at one point in time. There's a gal around here who wears a flourescent pink one to TT's (and its full body too- arms and legs)
*edit* my, my the things one can find on ebay (no this is not a manequin - it really is a suit......) http://cgi.ebay.com/Metallic-Purple-...QQcmdZViewItem