Hi Tweenyb
A friend in the USA recently sent me her two best Pumpkin Pie Recipes - insisting that the fresh ones we buy here are not suitable, Canned Pumpkin is definitely best. After reading your question and seeing that you still haven't found it over the past year, thought you might like to see the response I got from Waitrose Customer Svcs this week:
"I have researched our product assortment database and I am pleased to advise that Libby's Pumpkin (canned) is available in our branches. Should you find that this product is not in stock upon your next visit, please don't hesitate to speak with a member of the Customer Service Team in the branch who would be pleased to order the product in for you. When enquiring about this product in branch, please quote line number 020530."
So - I'm off to get mine and hope it helps you and any other readers desperate for some of that delicious Pumpkin Pie for Thaksgiving this year!! cpb