Classic Car Insurance with No Primary Vehicle?

[biningsource]

Classic car insurers want to know that there is at least one vehicle for every licensed driver in the household, other than the classic car itself. Otherwise, they argue, there's the likelihood that one of the drivers will resort to using the classic for routine use. Even if I could "go on my wife's policy", that wouldn't help. We are two drivers, with one vehicle - other than the classic car.