Re: Obvious solution
Back when I lived there, convertibles were pretty rare - I drove a Mini Moke for a while and during the summer you'd have the roof up for any journey of more than 10 or 20 minutes or you'd be burnt to a crisp.
Convertibles are much more popular in the UK (i.e. in my limited experience, convertibles are more popular and commonplace in climates where sunshine is relatively rare but winters not harsh enough to make them completely impractical).
But yeah, roo leaping on top of a moke is not really something I want to experience first hand (coming back to my car to find some jokers had picked it up and turned it sideways in the car parking bay was bad enough)