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This memory foam pillow off Amazon. You can add/remove foam to get it just right for you. I've never been in love with an inanimate object as much as I love my pillow.
I'm in the UK, and this is where I got the cut/shredded foam pillow (that actually made two pillows once I unpacked it enough for my needs - there was loads of shredded foam inside, way too much for one pillow in my opinion) https://www.amazon.co.uk/gp/product/B07PXMGYJS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The memory foam wedge I got cut and bought from a local industrial estate foam supplier/cutter.