I posted a few weeks ago my use of Hartz cloth for recovering pumps.
I said that the cloth is now a blend with synthetics.  I did not
realize that Hartz cloth has been discontinued for some time and the
material I have been using is called Stayfast.  The supplier I use is

  Bill Hirsch
  396 Littleton Ave
  Newark NJ 07103
  tel.: 973-642-2404

Paul Manganaro