Thank you both
AutoSlash I just submitted a quote in Autoslash - will PM you inquiry ID (though I don't see where to add the insurance inclusive offer?)
guv1976 Thanks for the tip though not keen on taking out a separate non-owner auto liabilty policy so will just look at the insurance-inclusive offers to simplify everything

Separately, has anyone rented a car in SBP? I've never been there and don't know what to expect - from what I read, the rental cars are onsite, not connected via bus/transit so I assume it's a smaller airport so hopefully smaller queues. Any tips would be appreciated as last time I rented a car in PHX and was shocked at how many ppl were in the queues and quite a long wait!