This knife block from amazon was almost perfect, except it did not have a tilt and I needed it to fit under my kitchen cabinets.
I modeled this base to fit into the groove in the existing base, providing a 15 degree tilt which was enough for my needs.
https://www.amazon.ca/gp/product/B08578MVLH/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1
I've uploaded the fusion 3d file as well.
The author hasn't provided the model origin yet.