Where can I find a curved tile to fit around edge of bath?
You can get a quadrant tiles set for a bath from a tile or Diy store.they come in a box in 15cm/6″ pieces and there should be enough in the box to tile around the length and 1 side of the bath. You may well find it best in the long term to get the bath re-set and secured to the wall better then re-tile the wall again upto or past the height of the bath to get a better seal. I work in bathroom and tile sales and come across this problem on a regular basis. Remeber whatever you seal the bath with to fill it with water first as the bath will sag with the weight. If you don’t do this the first time you step into the tub the weight of you and the water will break the seal and your back to square one.