[Campion]

I don't think any authenticated artefacts from the Second Temple exist.

There are two: link. But no others, AFAIK.

I would assume they were melted down for coins soon after being paraded in Rome.

With about a 99% level of certainty. Of course, there's still that 1% ...

[pierrem15]

Thank you for the link. No items from inside the Temple though.