US source of Panzerholtz?

It is fairly miserable to CNC, as well. A bit eating monstrosity it is... with a very narrow range of functional feed and rpm ranges. Delrin is similarly miserable to CNC.

One of the worst combinations, it is: Your sharpest finest bits, with the highest level of bit wear, in the most difficult to achieve ’quality result’ cutting set up. Instantaneous flow of the moment.. feed rate and rpm, stepover, etc, all become critical in the given moment --and the range is small. So you have to change everything in the cutting program to reflect this. Mastering a quality CNC’d shape in panzerholz is an achievement.

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

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

It is difficult to pack this stuff, it weighs a ton, for it’s relative volume.
The cheapest is smaller cuts, stacked, and sort of ’shrunk’ down to a smaller cubish shaped type parcel that can be skidded. sheets cut in half ... thus nearest to your most useful intended sizes - for your finishing cuts. Plan ahead! Ye old cut once thingie.

Meaning, the shipping costs per cubic inch/cm of material...can only really be mitigated when you ship a small skid’s worth of it. As, by the time you get to a skid shipment..., you are in a different shipping world. One of volume, not mass.

Think of it as attempting to ship granite slate.
FYI, the 15 and the 25 numbers, refer to the thickness of the layers, in any given thickness of sheet. the 25 has more layers per given cm/in of thickness of sheet vs the 15.

http://digitalexhibitions.com/PANZERHOIZ%20B15%20B25.pdf

They sometimes have bits of offcuts, but really, they generally sell only to ’power users’ of the product and that is direct shipping (from the EU, on skids) with no in between visit (on the ground) of the shipment at the the distributor’s physical location.

ie, when you call them, they expect something akin to a 10-20-100 sheet order, sent direct, by boat, on skids - from the EU to you. Due to the mass and awkwardness of this product, it is not really all that easy to have bits laying about to ship around the continent via common shippers. Shipping and packaging costs make short work of that idea. 

Extra FYI: it was originally designed as a bullet proof material for the interior of Panzer tanks, and is still useful for that original intended purpose. Buying a skid of it might get your name put on a list somewhere.