US source of Panzerholtz?

@nandric it's a German name for the material as far as i know, in Russia nobody use such name, but we have something similar under completely different name, unfortunately the difference is not like Vienna and Wien (i love that city BTW). It is similar to bakelite plywood ?

Dear chakster, There are to many objects in our universe. We don't
have names for each of them. So we invented the so called ''descriptive names''. Say ''iron horse'' for the first seen locomotive. 
Those are like ''x +2''. We know that this is about numbers but we
can't know which one. We need some name in '' x position'' in
order to know which number is meant. Those are called ''functional
expressions'' because they entail an  variable (x) . So such expressions are not complete. They need a name in place of the
variable x to get determinate meaning. ''The teacher of Alexander'',
''the author of Das Kapital'' , etc. Those who know that Aristoteles
was teacher of Alexander will ''feel in the gape'' and those who
know that Marx wrote the mentioned book will complete the
descriptive name with the ''argument'' Marx. 
So you are referring to ''descriptive names'' which entail only
a part of an  predicate. The other part needs  addition with 
other part of predicate to be complete. There is, so to speak,
one missing part. Aka with ''iron horse'' we in Russia mean an
locomotive (gin).

"BDR", means this company, re sourcing smaller bits (less than skids) of panzerholz in North America.

http://www.bdrsound.com/contact-us.html

Briefly looked into accessing some Panzerholtz and ran into 
the same issues as the OP specifically distribution and machining.
Ended up going with some Bamboo laminated sheet material
a friend uses in his manufacturing facility and price was
right shall we say.

Not in quite in the same league as PH but this stuff is also abrasive to cutters and very dense due to the many laminated layers.

At one point I made the regrettable decision to run an edge on the jointer
and it became immediately obvious just where the layers were laminated as it left matching groves in my new blades there after only very good carbide and replace when dulled.

Picture of plinth in my system page.