Stewart,
I was beginning to wonder if ANYONE had a 16 too!
Renwreck in Perth had a truly appalling 16TS a few weeks ago with 5 of the said wheels, but covered in surface rust. If they haven't thrown the whole disaster away (and I couldn't find a single thing on it worth scrounging!) they might still have the wheels. If you can find someone very clever (or are clever) it might be possible to copy the paint - they're more charcoal/grey than black.
Those wheels were fitted to the last of the 16TS cars in Australia in 1975-76. They were known as 16TS Specials, and had 16TS steering wheels and road wheels, velour trim and generally more French content. They made a large batch, parked them all over the place and sold them over a few months. I obviously have one.
Good luck.
JohnW