Go to a proper garden centre, they will have it It is a basic product for any nursery.
Far better than "Dipel" also by Yates.
That is a good set up for tomatoes Isn't it funny how "Better homes than yours" shows all these dinky consumer rubbish tomato towers and stands or premade tomato pots and a tiny little stand for them You have just shown how to make use of what you can get and to the right scale of things That rubbish you see in magazines and TV will handle a tomato for a few weeks before they outgrow them Great job so far