Thank you for the reply. The transfer would be from the port of Livorno to the city of Florence. We are planning to do a cooking class in the late afternoon, so we would need a taxi that could take us back to the port around 8pm. I've only found shared transfers that leave at 3:45pm, so this doesn't work in our situation. I had read another post that said some taxi vans are available, but not sure if there are any possible providers to contact in advance.