Hi, Jim- If the springs came loose in the first place because something broke or cracked, fix that problem first. Then you might try using needle-nosed Vice-grips to clamp onto the unattached end of the spring, wedge a bar of some kind near the attachment point, then use the bar as a fulcrum and the Vice-grips as a lever to stretch the spring where you need it to go.
You can make the lever longer by duct-taping the Vice-grips to a pry bar or something, but make sure the connection is secure before you put too much stress on it (says the voice of experience).

Oh, and safety glasses are helpful in case the spring lets loose at the other end.
Hope you're back in comfort soon.
Gary