Texas Steampunks & Neo-Victorians
I found this at my local Tractor Supply Co. Store for about $9 and figured I'd pass along the info.
The springs range from about 5/32" ID to 3/8" ID and from about 3/4" to 1-1/2" long in various strengths.
Of especial interest are the brass-finished ones, but they're duplicated in both electro-zinc and shiny black so you're getting about 6 of each spring in three different colors.
Very useful for such things as self-adjusting hatbands!