Yeah it's slim pickings alright.
Rosa of Diamonds has cancelled both her Saturday and Sunday shifts.
Best suggestions I have are Nicole of NNE (Sunderland) or Amber of Allure (Newcastle Quayside).
These might be too late for you but:
Tori Taylor has availability after 5pm (Jesmond).
Mila of Amour (via AW) is available after 4pm (Heaton).
Yazz of Diamonds has been getting good reviews and is available after 4pm (near Morpeth).