davidjharder You could even start your own unofficial repository.
Please no. These have been a huge problem for us in the past. Those packages frequently fall behind ours and can break on user systems. They also open a huge legal rabbit-hole that is best for both parties to avoid.
non-null If I make such a package and make it available to them as a file, are there any potential issues assuming I have made the package technically correctly?
Generally speaking, most packages require rebuilds after their dependencies have changed. By not working with us on this, you will need to be rebuilding whenever this happens rather than letting us do this for you as a normal package. This will open your consumers up to a whole host of potential problems and we do not provide support for unofficial packages.