When you download the app those files are in the locations you stated. It's a .tgz file.
http://splunk-base.splunk.com/apps/50944/splunk-for-f5-networks
Send me your email to sdaniels@splunk.com and i'll send them. But the fact that you can't see them in the downloaded file is a concern. I just did it and they are there. Might mean you will have other issues.
That was my assumption as well. They are not in the folders I described. Any other places they could be? Can someone provide me that PDF doc and iRule txt file if you have ?