Paranal and La Silla - transport options

Are there any agencies or cab companies which offer transportation to and from La Silla or Paranal? While I do drive in the UK am reluctant to drive solo in Chile, and the ESO site mentions there is no public transport.

Also from these 2 observatories, is there one which people recommend more over the other? I note ALMA is no longer accepting tourists.

Other observatories I can see seem to be more around Vicuna than San Pedro ( Mamalluca, Pangue, Cerro Tololo).

Thanks for any input and recommendations!