As a source for twill covered hose you may try HRP Hose & Rubber
Products in El Cajon, California.  Their telephone contact number
is 1-619-449-6766.

I stopped in there a few months ago and they gave me a sample of
hose that was amazing, to say the least.  They said that they could
duplicate any size that I wanted.  I can't remember the price they
quoted but it seemed reasonable.  They also carry the unwrapped hose.

Diane DeTar
La Mesa, Calif.