Mate I reckon stock Vespa px200 mirrors might work. They are really high and clear and I think the threads are the same. You should be able to find some because the threads in every px go, not on the mirrors but in the bike. I wish I still had mine, I'd give em to you but I gave them with the Vespa. I don't like these type of mirrors but they are certainly the most practical and if you're stiff , they are perfect cause you only need to move your eyes. The mirror glass is really good and weirdly when the bikes idling you can't see jack but once you get moving they are as clear as day.