Netcat sources?
That one is easy: Do an ftpsearch (for example with ftpsearch.lycos.com) for nc110.tgz Or tell me your email, the sources are only about 75k. Oh well, I just attached them to this post.
I was able to build a binary for the empeg some time ago (but can't find it now), but for some reason, I can't get it to compile and work under (and for) mandrake 8.0.
Update: I was able to compile it for both Mandrake 8.0 and the empeg, but I had to comment out a "#define HAVE_BIND" statement for both. Seems to work now.

cu,
sven