Thanks for all the replies! And Arpad, I appreciate the link to the custom solution in the forum. I think I’m too lazy to go to that level of awesomeness.
Update: I got the pillows. Of course, these are meant for the headrests, thus they have a tight elastic strap attached. They will not stretch enough to fit around the widest part of the seat back- so I can’t affix them in the lumbar area. But for what it’s worth, they work OK as extra support for your lower back, I tried out for 2 x 1.5 hour drives, they helped, and the quality looks good.
I recommend them as a quick and cheap work around.
