Oil Leak. Need Help Sourcing Fix

[ses0030]

So my bike has had a small oil leak for about the past year. Over the past few months, it has gotten worse and it's time to fix it.

The leak is coming from this area:




Looking at the parts diagram here: https://www.bikebandit.com/oem-parts/19 ... #sch132717 it looks like it's the Oil Level Gauge Sensor.

I suspect an o-ring has gone bad but I can't find a rebuild kit. Does one exist for this or does anyone know the correct size of o-ring? Or alternatively is there an aftermarket replacement?