This highly experimental and very much work in progress.

But as a concept, it actually works:

If you first start the proxy server with go run main.go you can do this from a Hugo project:

GOPROXY=http://localhost:8072 hugo mod get gohugo.io/npmjs/simple-icons/v5

The above will fetch the last version in the v5 series from npmjs.org, verify the shasum and package it as a Go Module. There are still some missing pieces. For one, it does not follow dependencies.