Heaviest K tow fabric available?

What is the heaviest (highest K tow amount) woven fabric available?
I use 12K and am trying to track down some 24K. Is there any companies which make fabrics using a thicker tow? 30K, 50K?

Please point me in the direction of a company that can supply me with heavy fabric.

https://www.jamestowndistributors.com/userportal/show_product.do?pid=97520