I still have a 1983-85 PPCo catalog which lists Wurlitzer valve
blocks.  Page  41 shows item 933 shows the "mounting block for
a pair of Wurlitzer valve blocks," price $4.75.  This page also has
illustrations showing its use with #702 valve blocks ($5.45) and
#934 lock and cancel valve blocks ($13.95 the pair).

Page 57 shows the Wurlitzer unit valve block #701 "made of wood
like the original," $5.34, and the #702 "(same as No. 701 with extra
instrument hole drilled in front with 1/4" straight nipple inserted),"
$5.45.  Also listed were the pouch ring, valve cover and compression
springs.  They are also listed in the 1991-1992 catalog and the
1994-1995 catalog.

Dave Geissinger

 [ PDF documents describing how to make Wurlitzer
 [ unit valves (of wood), by Bob Humes, are available at
 [ http://www.mmdigest.com/Gallery/Tech/humes_UnitValve.html 
 [ -- Robbie