I have 8 OEM springs, absolutely free to anyone willing to pay shipping and Paypal fee.
Four are from an early-model 260, and four are from a late-model 260....I honestly couldn't tell you which springs came from which car. They're all roughly 15 inches total length; and they're all roughly 12 mm wire diameter (except for one that is approximately 11 mm wire diameter....weird).
Post here or PM me if you're interested, and thanks for looking.