Does anyone know where I can get a few elements for my discone antenna ?

I bought it from Tandy(a.k.a.Radio Shack) electronics in the late 80's
but don't know the manufacturers name.

Tandy was bought by Dick Smith electronics so I can't go back and ask.

The elements are stainless steel hollow tubes;
4.80mm OD x 81cm(approx) long.

Am in Australia so local would be best.
Any ideas would be appreciated.

Boozo.