The Crux with well tested tires

After more than 70,000 km, I would have two new Pirelli Cinturato P7 225/45 R 17 front tyres raised and what do you tell me? “This type of tyre is not available at the moment. I should look in at the end of May again (at ATU). Is it more common that the tyres that have been tested particularly well (whether they are on another sheet) are sold out quickly and you can’t keep up with the production? A month means 4 – 5,000 km and really round I’m not going to be my old slats anymore. Well, I’m going to get through it. mfG Michael