Probably shouldn't say this but I bought a V shaped cushion from Shaws for my sister-in-law as she wanted a good pillow for breastfeeding. It was only £7.99!!
And a V-shaped cushion from Shaws is also what I myself used all those years back and it's still used in the house when anyone has a bad back and needs more support or for reading in bed or sleeping more upright if anyone has a cough etc etc.
Hiya, do you have any breastfeeding support groups or Toy librarys near you? Sometimes these have different pillows that they can either lend out for long or short periods. The thing with pillows is that you may find that you dont actually use them & they can be quite expensive so this may be a good way to test out different types & then if you find you want one long term you can buy one.