Thank you
That is going to by my comment. The clamps are available to buy (LINK first hit on google) but when I needed some for mine i contact brown church direct and ordered from them. but this looks to be missing the mount on the roof rack leg for the lamp to bolt through. I believe some early series roof racks bolted directly to the gutter but that is not something I would want.Looking at the OPs photo there doesn't appear to be anything on the legs to attach the gutter clamp part to?