Depending on your definition of "commercial availability" (it is pretty unavailable to me) Phase One Achromatic might fit the description.

One more comment: the relative intensity / sensor sensitivity (it ends up the same) of visible and invisible light differs greatly. Getting the exposure in invisible light right is more art than science (in my experience - near UV is about about 4 stops off, and near IR about 5, but a lot of bracketing is required).

Using filters and separating the three (UV, visible, IR) shots allows for longer times / wider aperture for the invisible light ones. Shooting with the same settings as for visible light would result in a dark image.

Combining all three spectrums in one image would in most cases lead to the visible light image "crowding out" the two invisible ones.

Depending on your definition of "commercial availability" (it is pretty unavailable to me) Phase One Achromatic might fit the description.

One more comment: the relative intensity / sensor sensitivity (it ends up the same) of visible and invisible light differs greatly. Getting the exposure in invisible light right is more art than science (in my experience - near UV is about about 4 stops off, and near IR about 5, but a lot of bracketing is required).

Using filters and separating the three (UV, visible, IR) shots allows for longer times / wider aperture for the invisible light ones. Shooting with the same settings as for visible light would result in a dark image.

Combining all three spectrums in one image would in most cases lead to the visible light image "crowding out" the two invisible ones.