You are in luck as everything except the chassis and shocks are the same as the rerelease Hotshot. Even more useful the parts you need are still used for the Manta Ray and several touring cars, so the parts are readily available from any Tamiya stockists.
The part you need is Tamiya part number 50648.
For parts that aren't used on the rerelease Hotshot oyur best options are ebay, or a wanted ad in the forums on
Tamiyaclub.com
If you need any other part numbers the manual for the rerelease Hotshot is here
http://www.tamiya.com/japan/download...l/hot_shot.pdf
and the original manual for the super Sabre is here
http://www.modelbuild.co.uk/manuals/58066.zip