my $found;
foreach (@{$mech->forms()}) {
   if ($forms->[$_]->find_input('shopwizard')) {
      # Mess with guts.
      $mech->{form} = $_;
      $found = 1;
      last;
   }
}

die("Unable to find shopwizard form\n")
   unless $found;

$mech->submit_form(
   fields       => {
      shopwizard   => "Winter Love Usuki Set",
      criteria     => 'exact'
   }
);