plinth material

Hi All, I have two questions really. 

I'm planning on building another Lenco 75 on a PTP5 top plate and am seeking a supplier of phenolic resin impregnated wood here in the US for construction of the plinth. A commonly known brand is Panzerholz.

Secondly, Is there a different material I should consider instead?  I have one I previously built out of slate so looking for something different this time.

Thanks