Torsion bars

[Son of a gun-ner]

Forgebear also sells these for the other ends.
Taigen Tiger I Full Metal Collet Repair Kit for 1:16 Scale Tank
https://www.forgebeartanks.com/store/p1 ... Tank_.html

But I can't see the actual rods/bars for sale.
If you can't get the actual bars, purchase some piano wire the same diameter, that's if you're willing and able to do any required bends. Piano wire the same diameter should work close to the originals. If they are slightly softer, put them near the centre. If they are slightly stiffer, put them at the extreme front and back.
Also, a tight fitting piece of brass tube over the collets will add some strength to the weak metal they're made from.

[Topper]

Thank you Gentlemen
The pics are from the seller, hopely he can post the tiger today,
Thanks again
Frank