I couldn't find a thread, but did find a thread talking about uploading sounds to LFSWorld.
Anyway, using the in-game sound editor I think it may be a good idea to be able to share/send to others, in a similar fashion as setups.
I looked at the .eng files and they are about 4 times as big as setup files, but still think it could be done.
EDIT- I have an odd feeling it can already be done but I checked and I don't think it can be.