on-line sources for materials suggested

merriartist
Friendly, personable; free shipping on orders over $90. Carries all of my art supplies including the W&N series 995 aquarelle

Daniel Smith 
the pigments I use. Check other values.

Jerry’s Artarama
Good source of brushes mentioned — type in Robert Simmons 785 watercolor

Dick Blick

Cheap Joe’s Art Stuff
often best price for paper