There were several variations in Manualo bellows systems.  Most of
them have the bellows hanging from the keybed.  One version has a metal
flange nipple supply that has a rectangle flange on it that the stack
sits on with the nipple protruding through the keybed, and another
has the wooden box under where the stack sits.  There is another later
Manualo that has a more normal bellows system sitting on the floor of
the piano.  Which one do you need?

These two questions are obviously for the same piano.   I don't know
if I have any spares.  I have about a dozen Manualos, though with only
a couple missing parts that may be there.

D.L. Bullock    St. Louis
www.thepianoworld.com