Searching for a mast cap

Hi! I brought home a 1986 Capri 14.2 yesterday and I am missing a mast cap. I am wanting to install a wind indicator. There is no good place to install along the front or the back because of the rigging. It will have to go on the top. Does anyone know of a place to get one? I’ve searched and searched online. I guess I could also affix some sort of bracket to give me a flat spot? Former owner had a turtle floatation buoy that he attached with brackets.