Hi Andra! so sorry it wasn't helpful. It may be more difficult to find one in stock than I expected. If demands for the pillow are small, they'll disappear soon from the market.
Can you handle sawing machine? As you can see in the picture, it looks easy to make one. If you can't handle it, just look for a tailor store around you, let him/her make two/three pillow case with a hole, then you can stuff them with old pillow's filling or so.
In this way, you can pick preferable fabric design, you can customize the size just right for you, and you don't need to rely on products on the market.
I hope you solve this problem soon, sound sleep is so necessary for your functional day. Take care.
