I urge caution using this approach to a data diode.
The question you ask is a very important one: where can I find a working configuration?
Do not get me wrong, it is possible to make such approaches work, I have seen them in my companies test lab.
The question you have to consider is reliability and trust.
How reliable does the solution need to be? My experiece has been making something work in a test lab is relatively easy. However, making something work in a deployed environment, thus sustainable 24/7/365 is much harder. Intermittent data losses will happen over time? How does your application manage these? How do you implement re-synchronisation (can't be triggered automatically, as there is no feedback loop).

Sorry, I am not answering your question directly, rather rasiing issues you need to consider before building something yourself.

These issues are explored further iat the links below.

Link: http://colinrobbins.me/2013/02/07/diy-data-diode-for-1612/ (reliability question)
Link: http://colinrobbins.me/2013/03/12/can-you-trust-your-1612-diode/ (trust question)