I've been using Primitive Originals for sinew and they have been great to deal with.
http://www.primitiveoriginals.com/

: Is there a "one stop shop" for SOF materials? Here's a
: list of what I know I will need, and am wondering if there is a
: common supplier that might carry all of these things without
: having to go with mulitple internet orders.

: artificial sinue (sp?)
: needles
: fabric
: finish
: stainless steel staples
: dye
: and......everything that I'm forgetting:).