Bowling balls (Whitley SN12)

A long shot, this, but I’m looking for some old wooden Bowling balls. It doesn’t matter how scruffy, they only need to be full size (about 5.5” diameter). I need 6 to make into dead eyes (see photo) to rig a Victorian sailing vessel that a friend is restoring. If anyone has some knocking about, I’d be very grateful for them.