I just put in a gun order to SIG. Their latest summer show spreadsheet showed that P225 A1 mags were still available for dealers to order. However in our case I didn't order any because our shop didn't have all that much success with the model (at best a half dozen or so sold during its lifespan), and our meager customer base hasn't been clamoring for them. If you can find a factory SIG dealer close to you, perhaps you can get them to order what you need in.
Oh, I forgot, welcome to the forum.
Posts: 431 | Location: The commie, rainy side of WA | Registered: April 19, 2020