BTW, it's more likely than not that you won't find the cables NOS, even at the places that say they have them, but it's worth trying. I actually found one on a shelf at a European parts supplier a couple years ago, so it is possible.
Before I found the one I was seeking, I investigated having...
I've never used one, but there are several online places that offer that kind of service.
https://www.french-office.com/shop-ship-in-france/
https://www.easy-delivery.com/en/
https://www.forward2me.com/
There are several others.
You may have already seen this, but Toyota Xexpress.fr shows the rear cable in stock as of Jan 2 2023, and Megazip shows the front cable in stock.
Handles would probably need to be salvage or just adapt the ones you have (I think the levers are the same LHD vs RHD, you'd only need to figure out...