I bought one at Wal Mart, I believe...though when it went bad, they didn't have another one. Hoppy was the brand, which Wal Mart does carry.
That was for a '97, though, which has amber rear turn signals and thus requires a converter box to get down to a four-way.
EDIT: as I'm thinking about this, maybe I ordered the first one from JC Whitney, and then tried Wal-Mart when I needed another one yesterday.