This one appeared on ebay a day or two ago.
http://cgi.ebay.com/ebaymotors/ws/eBayIS...RK%3AMEWAX%3AIT
This is just to add to the discussion. I have no idea or opinions if it is real or not. It does have the right bowls, dated 541 with the EH on the opposite side from the 3310 stamping on the air horn.