Robust plastic mold of two fish chasing each other no support needed, Fill with cement cut open mold. Either glue gun back together and bind with gaffa tape or make conventional fibre glass and rubber two part mold from first cast :) Or cut in two parts and use a pair for bench ends ie put severed bit on top of wood bench so looks as if fish are diving thro wood :) no. Pics I'm afraid made last century. This is a new one bought from America unused
eBay