For years I looked for a source of the twill covered hose that PPCo sold.
Mel Sutter found me a likely source for the hose in Rochester, New York,
named Chamberlin Rubber Co.  Maybe one of the MMDers in New York could
check them out.  http://www.chamberlinrubber.com/ 

The tubing PPCo sold came from Reed Rubber Products in Missouri.
But not the twill tubing.  Should anyone want to invest many thousands
of dollars in tubing?  It was made a few thousandths undersize and is
sold by tubing companies including W.W. Grainger under the Santoprene
name.

I used to buy the brass tubing direct from K S Metals in Chicago.  They
make brass sizes that telescope, or in other words, one size fits into
the next larger size to make reducing connectors.  You could buy the
brass annealed so you could bend it into nice curves such as an Ampico
drawer.  http://www.ksmetals.com/products.html 

I still buy leather from Columbia Leather in Pennsylvania as it is
really nice.  http://www.columbiaorgan.com/col/ 

I always liked hide glue and still use it.  I buy it in 55 gallon drums
with another player restorer.  We use 2XT strength.  This is stronger
and faster than the glue the typical wood store sells.  It may be
available from John Tuttle Player Care web site.  John also has the
nicest pump cloth you have ever seen.  http://www.player-care.com/ 

My nickel plated slot head screws come from Schaff piano as they now
own American Piano Supply Co.  Tell them what you need and they will
usually get it to you.  http://www.schaffpiano.com/ 

My favorite spray paint in satin black comes from Peavey Electronics
and is a touch up paint for loudspeaker cabinets.  Try your local music
store as it matches a Seeburg perfectly.

Don Teach - Shreveport Music Co.
Shreveport, Louisiana

P.S.: I would never recommend anything but hot hide glue to glue
pneumatics on to the deck boards.