Now, if it were me, I’d arrange for a “long” test drive at the dealership, as a potential purchaser. That’s got to be the safest and easiest way. A private individual would fall foul of insurance issues as most say not for hire or reward? Even if your husband was insured to drive other vehicles, it’s usually third party only. Heaven forbid something went wrong but if it did, there would be problems. Sorry, this isn’t helpful in one sense but you can see where I’m coming from.
Barrie
edit: you could combine it with a trip to New Zealand
a bit nearer
http://www.greatescapecars.co.uk/news/new-lower-prices-on-summer-convertibles-41
or here
https://www.hiyacar.co.uk/rent-a-car/1834-7103-mazda-mx-5-rf-sport-nav-in-basingstoke-rg24
Another option to combine with a short break: https://highlandmx5hire.com/