Best place is near Taunton
called Barnclose Nurseries, he is private so will do 25 for your freezer but not for resale....well I dont think so!
He does mine and i take them in in boxes and then collect an hour or so later oven ready!
phone no is 01823 443 507
Otherwise you need Rona and Neville Amis at Fingle Farm near Okehampton.....commercial poultry abattoir