I've ordered stuff from
Pots and Pans before - they have china and metal options. I actually prefer metal (loose bottom) as it's less likely to produce soggy pastry but if Granny is experienced with china she'll be OK!
Most high street hardware stores will sell them but you'll also find them in bigger supermarkets too. If you're feeling flush, John Lewis or Waitrose will have a good range I expect.
Nice to know I'm not the only one still shopping - good luck :)