Free radar pylon mold
 

It is more a plug than a mold, but if anyone wants it, I made a screw together mold for a radome. I have a Lowrance 3G and the old radar mount was 4 x 160mm (6-3/8?). This plug makes a spool shaped spacer so you can put whatever bolt pattern you need on either end.

I think I put it in storage. If anyone wants it, let me know?

It is nothing special, but with a little modeling clay and some wax and PVA you can retrofit a radome to an expensive welded aluminum radar arch. Or some sort of belaying bollard/samson post.