I think you're referencing post crash photos of #009 which was repainted Dark Silver during its repairs. Here's the car wearing its original Magnesium Silver paint:
Another problem with making assumptions on completed cars in old photos taken inside the factory is that they could always be of an earlier production car that is back in for service. I'm guilty of doing this before too.
So, #049 is a definite possibility for that silver car but it would be hard to say so with certainty I think.
One more note - and maybe it was a typo on your part, but #065 was also Magnesium Silver.
>8^)
ER