Hello, I am a single woman, just now getting my pension

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I had a stroke 18 months ago and have limited mobility. I use a mobility scooter to get to the shops.
I have booked a week's holiday in Kos and will he hiring a mobility scooter there, rather than take my own. My concern is that the hire company offers no insurance for theft, damage, personal liability or injury. I can't find sny travel insurance to cover any of these. Does anyone have any suggestions>