The McMaster-Carr Supply Company stocks stainless steel spring
temper strips in many sizes, including 2" wide x 0.008" thick stock.
They also have carbon steel 'clock spring' stock, and phosphor bronze
spring strips.  Click here:    http://www.mcmaster.com/

To get the correct page for spring strips, when the page appears,
type 2987 into the "Find" window in the little green search engine
in the upper corner.  A 2" x 0.008" x 15m coil costs $108.

This company has a very extensive on-line catalog with all kinds of
goodies, and a very thorough search engine.  They have always handled
my e-mail secure credit card purchases promptly and efficiently.

Richard Vance