I ran into the same situation. I called the Cessna parts dealer..........believe me, you do not want to do this...........I know Cessna parts are about 5 times what they should be, and I can definitely give some other examples, but........the gust lock was over $300. Needlss to say, I made my own. Some of the decal packages have a gust lock sticker included.
Bill Warner
Medford, OR