Have you lost the seat to your DanStol by BabyDan or has it been damaged? Then you can buy the seat as a spare part for your high chair here.

The seat fits all DanChairs produced in 2013 or later.
You can check if your DanChair is from 2013 by either checking the part number, which should start with 2638, or checking the back support. If the back support is made in one piece with a hole in the middle, your Danchair is from 2013 or newer and the seat will fit it.
If, on the other hand, your DanChair's back support is made of two separate pieces, your DanChair is older than 2013, and unfortunately this seat will not fit it.