Just for interest sake

[bonnevista]

I came across this site when I was on an American Pontiac site the other day.  It may be of use to some.

https://www.seatbeltplanet.com/seatbelts-and-accessories/

I contacted them and they do ship to Australia, but don't take overseas orders via their normal online ordering, so if you want something, shoot them an email first and go from there.