Let's talk headboards

[Tremping]

Would like to be able to sit up in bed and read or whatever. So high, comfy, padded. These cost £1000+ in John Lewis!

Where can I go for a quality item at a more realistic price?

Your link isn’t working

It wasn't meant to be a link - MN made it into one

You said ‘these cost’ , so I assumed you were linking.

I think it's be more inclined to go for something like this
https://thepillowhome.com/products/luxury-chic-wedge-pillow?tw_source=google&tw_adid=717014662460&tw_campaign=21560938929&gad_source=1&gclid=CjwKCAjwvKi4BhABEiwAH2gcwweABU73ClqLM5Pvh07OeFZeHU9uWLr3w-TbnDKCS8uds9iVU_J2WhoCCpwQAvD_BwE
Because you can't clean a padded headboard easily, and they are completely vertical so not actually comfy you end up bolstering with pillows anyway.
This option has a removable cover for cleaning. And pockets!

They do their own on TV, with wadding, fabric and a staple gun.

Exactly this.
It would be simple to get a piece of foam cut and cover it with a fabric of your choice either sewing or glueing it.
Then, add some ties, put a rod on the wall, and attach.

Look at Etsy.

Nice suggestion if you have time and are inclined. Simple it may be, quick it would not be, so don't feel bad if you decide to shell out £80 for one that's already done.