Check this thread:
My own favorite:
https://www.amazon.fr/gp/product/B01M9BGFJM/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
You don’t need 9V, 12V is the voltage delivered by Elektron PSU.
[Moderator mode on] And also, please watch your tone, especially towards someone who’s trying to help you. This is no way to treat someone you don’t know. [Moderator mode off]