Tracing a Guarantor

Tenants have vacated the property owing rent.

A guarantor is in place, but they have moved house, and the agency only supplied me with the guarantor’s postal address.

I have tried going back to agents, but it was from some years ago, so I am struggling with additional info.

What company can I use to trace the new address of the guarantor?

I only have their name and previous address (though I think I found her on FB, I can’t see any other helpful info…).

Thanks