This repository contains a 3D model for 3D printing. The intention of the print it to serve as negative for a silicone mat. This mat can then be used to convert remains of epoxy into tools.
If you are living in the US, you can buy something similar as 'Utility Mat' from Artist Keith Decent.
You can find a long description of my process building this tool mat on my blog: https://www.davidbeck.online/post/2023-04_epoxy-mat/