OKay, after finishing my new diffs, I now have 4 spare outputs that I dont need.
You can just see them in the far right of this picture- they are for the HB 1:8 diffs and will work on any HB lightning 1:8 stadium truck I believe.
They are new & unused, and free to a good home- you just have to cover the shipping which will be a whopping great..... $6 to the USA. First come = first served!