Hey man, with the panhard rod don't cut up the ke70 one. With the size of the rod and the turnbuckle to fit in it, it will be very weak.
What I did is get a commodore panhard ($10-$20) and go to wholesale suspension in penrith, ask for a turnbuckle to suit the commodore panhard rod (~$60), cut the panhard to suit the length you need and weld in the turnbuckle.
Superpro bushes are bout $20 for it. For the bush that goes on the diff you will need to drill this out to suit the size of the pin, I used a 16mm bit from memory and then pushed it on.
Ive done the exact same thing for a mates ke70 too. Works a treat.