XLR-V Tire Replacement
As you already know, Pirelli run flat tires are no longer available and very few tire manufactures carry both sizes required for the car.
Continental Tires make a Pro Contact performance tire in exactly the same size that is required for the XLR-V. They are not run flat, but they are performance tires.
You can inexpensively purchase a very nice tire plug repair kit complete with all the tools you would need to make a tire repair on the car. You can also inexpensively purchase an electric power air pump with a gauge on it. The pump plugs into your cigarette lighter socket for power and it will easily pump up your flat tire after you have repaired it, or you can just fill it up with air and drive it to a near by tire repair station for a repair if the leak is small.
I purchased both the tire repair kit and electric inflator from Harbor Freight. Check them out on-line to make a buy!