Sadly the headband seems to be the weak-spot of the T1. If mine ever deteriorates, I may just get the headband from one of the cheaper DT Beyers or the gaming line of Beyers and use those headbands as they will fit while trying to keep the T1 yoke as I heard the T1 headband is expensive to replace.
T1 headband replacement kit is 600 EUR. Nobody will pay that. I think Amiron headband matches the T1, but I never tried.