If you just need to double check your fit data, I’d would order SLA’s of your design(s) and have people try them out. A “head model” (which I assume is a manikin) can show you that approximate fit, but can’t tell you if they’re actually comfortable!
It’s funny, I feel like most people would have the opposite problem–they’ve created glasses that fit them and their friends well, but they’re struggling to get real technical data, of which you have plenty. Sounds like an awesome resource to have at your disposal.