I suspect many would be far more open to clearly non medical usage of machines they actually own or lease. What you were asking for isn’t any, and had perceived risk for them.

If I was a random clinician there is no way I would have helped you either.

If you do want a MRI done out of curiosity your best bet is to go through biomedical imaging research group who needs subjects, I would guess. Unless you happen to live near a manufacturer.