You can purchase the desired TAKE on the Marketplace web page.
Access the Marketplace: (https://momentica.com/marketplace)
[Take Tab > Enter the Marketplace > Click on the artist you want > Click on the desired TAKE from your owned board list > In the Trade Board, select "TAKEs Currently for Sale."
If there are no TAKE currently for sale, you can use the "Shout out" feature to request sales from users who own TAKE.