Custom firmware with security patch

Hello, i received the email from Zyxel about the security issue of 4.60 firmware that is the one i'm currently running. Unfortunately for me it's not easy to upgrade because my USG310 have a reboot issue with standard firmware that was resolved with a patched custom firmware that your support send me after asking it, so it's possibile to have a patched firmware that fix the reboot issue that involve my USG310 *and* the security issue you evidenced?

Thank you and regards
Luca