Tuesday Morning in the US has some interesting art supplies for sale (they are a big re-seller of higher end 'stuff' in the US).
I found tracing paper on the roll (12"x50' @ $6) and some watercolor paper (140lb 12 sheet 9x12 $4) made by Seth Cole. I had never heard of them, but after doing a search on them they look like a high end drafting supply manufacturer. 1/2 to 3/4 off normal retail.
They also have Koh-i-noor pastel pencils (6 for $6) and drawing pencils. The drawing pencils look like Tombows, but the quality is not the same. A tin of 12 5b-5h was $8.
They also had an assortment of Grumbacher watercolor brushes. The Academy brand. 3 brushes for $2-$4. I don't like the natural ones-a lot of hair fallout, but the synthetic or 'ok'.