Knob for Duktig Ikea children's kitchen with scanning

This is a knob for Ikea Duktig children's kitchen.
The knob engages when turned.
The numbers are painted with a pen

A spring is still required:
Length: 16mm
Inside diameter: min 8mm
My spring is out of this box: https://shop.der-schraubenladen.de/sortimente/federn-sortimente/1527/federn-sortiment-200-tlg.-box-f200
9,5x16 mm
Wire diameter: 0,6mm
I think this is also usable https://de.aliexpress.com/item/1005002772073879.html?spm=a2g0o.productlist.0.0.6ce41867nt4Nrv&algo_pvid=5b42fb5c