Hi, David --
My first tolerably decent bike was a lime-green Mercier that I rode into the ground (and stripped and abandoned in Marseille), and if there's one thing I learned from the experience it's that we lime green folk have to stick together.
Here's some links to get you started in your search for lime-green handlebar tape:
http://www.octto.com/
http://www.yellowjersey.org/
http://www.bikeforums.net/
I think an eBay seller has some lime-green Schwinn tape, but it's probably that awful plastic stuff they used to put on the Varsity model.
Good luck!
PETER CRAIG MARTIN
SEATTLE WA