I've had some luck taking misc parts that I can't find (springs, fasteners, etc.) to the hardware store and asking if they have anything close. We have two hardware stores, one carries a fair sellection of springs of all types & sizes but won't order anything they don't stock. The other doesn't carry many but will order about anything if you're willing to wait a week.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.