Australian beetle interior colours

Hi all, i have a 71 superbug, its painted the original shantung yellow, and has the dark brown original interior.
I'm wondering if anyone knows if this exterior colour came with any different interior colours? Mine has brown seatbelts, which need replacing, and it doesnt look like i can buy new brown ones.
thinking of changing the complete interior to the factory red.

Below is a copy of the 1971 Volkswagen colours for the US market.

That colour chart will not help at all.

You can have your seat belt webbing replaced by an approved seat belt repairer in Perth in any colour. They also make new belts in any colour, but with modern buckles. Do a Google.

Wattle appears to have come with black trim as well.