If GPE doesn't ship to Mexico, it looks to me like Mouser carries these as well (https://www.mouser.com/ProductDetail/Central-Semiconductor/2N6427-PBFREE?qs=sGAEpiMZZMutXGli8Ay4kPP92xwE9Ja%2F%2F5bbcpRbGrc%3D), and the part still shows up for me if I use the location drop down and select Mexico.