Kohler CAD blocks is one of my favorite manufacturers because they do a great job with offering digital files of almost their entire collection of products.
Essentially, its one of the best to get kitchen and bathroom blocks (sinks, faucets, bathtubs, toilet seats … etc).
Here you will find a free company library Kohler CAD Blocks.
Kohler makes it very easy to find their CAD blocks because they include them in each product page.
You might have a few challenges with Kohler CAD blocks as some products only have 3D CAD files with no 2D CAD drawing, and some of their products are no longer in production so no CAD blocks offered – they probably left the product pages to keep offering general documentation and support materials.