I designed a roller for my blinders that fits what i already have (just a plain rope).
I bought parts from aliexpress (motor and motor controller.
https://www.aliexpress.com/item/1005005101898123.html?spm=a2g0o.order_list.order_list_main.40.5e0b1802uBqyOL
https://www.aliexpress.com/item/1005005789030046.html?spm=a2g0o.order_list.order_list_main.173.5e0b1802uBqyOL
Prinits is basic, just for the roll you need supports.