halo reach (legacy) armor issue

the military police helmet, CQB helmet, as well as their variants and the UA/BASE security chest have become locked despite being previously unlocked and purchased on my account. since I no longer have an Xbox 360 and have no way to access the halo waypoint app to attempt to re-unlock them to fix the issue I am left without the ability to wear my favorite helmet ;(
I have no idea what caused this issue, it has never happened before in the many years I have enjoyed this game and the countless times I’ve switched my helmet the military police helmet was always available to be re-equipped. if anyone else has this issue or has found a solution I would really like to know. thank you.