If you do decide to make it yourself, I’m curious to see the result^^
It’s not actually DIY, though it could have been. This is the store link with more pictures and specs: https://www.zooplus.nl/shop/katten/krabpaal_krabmeubels/natural_paradise/wandmeubels/537547
Awesome! It looks sturdy! On the store version the bed is held in place with velcro, with one side stapled to the wood. This works well to keep the bed in place.