I'm not sure, but I've seen so many offers of charters from Canada on my Mexican Telegram channels. Join one of the Escaping Canada chats and ask. You have nothing to lose. The first is the main channel, 2nd is the chat.
https://t.me/EscapingCanada
https://t.me/joinchat/qohmSG2uQGE2Y2Mx
Or this private charter pool channel- they have 19 seat charters for global budget of $32,000
http://t.me/privatecharterpool
This one's for sailing out of Canada
https://t.me/joinchat/SkjtSbeRCFpmNTAx
Here's a charter with 12 seats budget flight $21,000
https://docs.google.com/forms/d/e/1FAIpQLSf8thMXTk0LDHr8u5ACES4zVJpwbf-CMeylBKdNMZPBG9gEOQ/viewform?usp=sf_link
Mexico Immigration is now cutting down on the 180 day allowance on stays. Either the charter can print you a fake return trip for 5 or 6 months later or just make them understand that you need 6 months. Otherwise apply as a refugee.
Hope this helps🙏