You can use the 4 speed tranny, but you'll probably snap the differential sooner or later. The 4E-FTE's tranny is a bit beefier and I would definitly recommend using it.
To get spare parts you pay a premium and usually order them from overseas. Or, you ask around and try to find used part in the US.
To get spare parts you pay a premium and usually order them from overseas. Or, you ask around and try to find used part in the US.