The Suzuki replacements are hard to find. Believe it or not, you may be able to find them at your local Suzuki dealer, if they have any old stock. I found a dealer down in Alabama (?) a few years ago that had a web site to sell parts. Google 'Suzuki Keys' and you may get lucky.
The replacements you find on EBAY are actually Mitsubishi replacement keys (a little longer than Suzuki) but they work if you don't mind the key sticking out a little farther.

Bill
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God Forgives, Rocks Don't...