where would you buy dead bolt lock set up for a van ?

Hi

I would like to buy a dead bolt set up for the side door and rear door of my van

something that has an electric solinoid that pushs a rod thru the other door,

I am thinking of something like this

http://www.sprintervanequipment.com/CargoLockElectronicDeadBoltLock.aspx

I could just have a shop copy what is on the link , but hope to find one ready made that I can buy more later ,

or maybe a better idea

it does not have to be 12v , just needs to be mostly invisible to the public and not just a big ugly padlock across the door

thanks for your ideas