I have this issue too, but I am working on a python script that will send events to Splunk using the HTTP Event Collector. It's not finished yet but, I should get an initial version done this week. When it's done you can call the script via a cron job and it will read the latest logs and send them over to Splunk.
I have the first few commits here: https://github.com/alecdhuse/VPS-Log-Watch
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