There is a Stroud Duo-Art on eBay: 

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170396800707 

But this instrument does not have the typical roll motor.  I wonder if
Aeolian used different roll motors at one time.  It also has a
different pump, perhaps a replacement.

Your thoughts?

Bill Chapman
La Quinta, Calif.