You are describing breakdown insurance, ie the AA or Green Flag etc. Either paid with or separately from your vehicle insurance, you have to pay extra for cover on the continent. Everybody should have this. If you get a puncture on the road they come & change your wheel if you have a spare, otherwise they will do whatever to get you back on the road including transporting your vehicle to a tyre depot. Obviously if you carry a spare your delay will be less.
just google tyre insurance ..theres a few companies out there offering it but it doesnt look cheap... I'd guess it would depend on the value of the tyres you have fitted whether its worth it or not...???
the best insurance you can have is to carry a spare tyre, my motorhome came without (ford based) for around 300 pounds I know have a spare tyre slung underneath where it should have been in the first place