Ask HN: Anyone know how to get a tour of Tesla?

Sorry, I've always been relatively quiet on here, sometimes contributing. I'm currently on vacation from the UK and would love to take my children (14 and 10) and wife to see the Tesla factory but I gather that it is only available to owners. Does anyone know any way to get a tour as my eldest son loves engineering and has read everything he can about Tesla. We're staying with relatives in San Jose 25th, 26th and 28th so if anyone can be of any help it would be much appreciated. I understand it might be stupid asking on here, but I thought I'd try!