Looking to identify what vehicle used this pair of vintage Rotax head lamps. The lights are massive (face is 10 1/2" diameter x 8" deep). They were in my grandmother's loft in the UK with the story that they were from a Daimler used by Churchill following the war. All involved with this story are now deceased -- so I'm trying to track down the vehicle they might have come from. There no visible serial numbers or markings other than the ROTAX emblem atop each lamp. Any information would be greatly appreciated. Thank you.