six blade steel fan for tiger

["Parfitt, Bill @ PDX" <BParfitt@GlacierNW.com>]

hi folks, i recently purchased a six bladed steel fan for my tiger before
knowing the correct diameter of 14 inches.  needless to say, when i tried to
install my 15 inch version, it hit the rack housing.  i notived however,
that the amount of clearence required did not seem to be great.  my question
is can the 15 inch blade be ground to fit?  if the elusive 14 inch is the
answer, does anyone know where i can get one? thanks, bill