I already have the old setup in my FJ but went ahead and ordered a new cord and plug. Does anyone know if I will need a new wiring loom or can I just add the new plug to my loom?
Looks to me like they are the same. The link you posted is just for the socket, while the link I posted is for the whole harness, but the sockets look the same.
Here is mine installed in my 4runner for my 50 ARB Fridge. This thing as solid as it gets and absolutely no wiggle.