Can someone tell me where to get the mechanical speed sensor plug for my TKO?

[BONE_STOCK]

Hey guys,
I tried searching for it but I can't find what I'm looking for.
My TKO-600 came with a rubber plug for the mechanical speed sensor.
Well since I'm using the electrical connection. I need to get rid of the rubber plug and replace it with a plug I saw before.

I can't remember where but it's basically just a plug with an o-ring.
Does anyone know where I can get this asap?
Thanks,
Mike