John Ayer wrote on Sun, Jun 27, 2010 08:08 PM EDT:
I made a slight mistake. The set with square towers as rooks and the footsoldiers reduced by about a quarter to serve as pawns is at http://www.chessbaron.co.uk/chess-TH2003.htm . That company carries four sets based on the Lewis chessmen; the other three all have runestone pawns.