My 89-key Gavioli probably has similar wind requirements. Its bellows
were lost in a salt water flood of the organ some 50 years ago and it
has been playing on a blower since then. The blower on my organ comes
from B.O.B. Stevenson http://www.bobstevenson.co.uk/organ_blowers.htm
They are still in business and were extremely helpful when I talked with
them by email and on the phone about my older model. With the plummeting
value of the pound vs. the dollar they may well be a cost-effective choice
You may be amazed by the start-up current drawn by a blower -- I was!
Unless you can reliably connect to a 220-volt power supply with a hefty
amperage rating, I'd strongly suggest opting for a motor with speed
control or a soft start feature. After much trial and tribulation
I ended up running my blower on a 1.5 hp 208-volt 3-phase motor using
a programmable variable speed drive by Baldor Electric Company
The drive converts 110 VAC single phase input into 208V 3-phase variable
frequency output (a clever device indeed). With this I can start up
and run reliably on any 20 ampere circuit and many 15 amp circuits.
This was not a cheap solution, but many other configurations resulted
in tripped breakers and a silent organ.
Pressure on my organ is regulated by springs and a lead brick on the
original reservoir bellows. While in theory you don't need a reservoir
with a blower, I've never seen an organ done that way. My blower is set
up so that the reservoir constantly dumps air through the relief valve
except at the most forceful fortissimos.