Hi There,
Sorry I had to join up to share what I had found. I've seen so many posts of people permanently removing the buzzer, cutting wires, wiring up additional switches, disabling door switches etc. All of these seem so crazy when you see how easy it is to do!
This might be a little easier to do on RHD models, but the concept should be the same, just a bit more difficult to get to on LHD models.
Here is a video for those who don't like to read:
https://youtu.be/SZqgZh829Wg
1) Pop open the fuse panel in the drivers knee panel.
2) Look up in there with a torch and you will see a four pin connector with a green sheath.
3) Disconnect the connector.
That's it! No damage, completely reversible, and quick enough to do even if you just want to disable it for a quick job where you need the door open. No tools required for the RHD edition.
If any LHD FJ'ers would like to test and report that would be great!
Thanks for all the help that the forum has provided so far.