Where to buy lower radiator hose with spring?

Wind one up. Can't be that hard. I don't know, anymore, where you get "piano wire" but hey, we got's the whole darn internet...............

Something that might work is the small stainless whips used on thousands of two-way and CB radios. Places like service shops sell replacement whips, because when you set one up, you choose the loading coil, and trim the antenna whip. Heck, Radio Shack might even...............

I don't know what diameter.........

http://www.walcottcb.com/300122-littlewil-replacement-whip-p-1798.html?cPath=377_352_504