Any Info on pal heavy sixers

Hi, I'm in the uk and have been looking for a heavy sixer for over a year, these things seem very very rare over here.
Does anyone know if there's such a thing as a pal heavy sixer with a "chess piece" box or did heavy sixers even come to the uk as what I have seen here are heavy sixer cases with Sunnyvale light sixers inside.
Any other sixer pal information would be really appreciated