Much appreciated advice, thanks.
On calling the main Pirelli distributor, as soon as I mentioned Corsa, no size, nothing else, the guy asked "you have a Maserati? According to him they are the only cars that factory fit them here. Not sure if he’s right, and only 6 or so stradales in this part of the world. But, I was impressed. He only had regular PZeros, which, according to him, were 50% harder compound than Corsas.
Given that last weekend, on a fast 3rd gear, shallow curve, dry, uphill, 25C, the back tried to overtake the front on me, I'm worried to try anything less sticky.
I might try to import them from the US should nothing appear locally. Ah, and no rain here for 9 months a year..