As I was recently emailed about this, I thought I would update it. The CR2-12V relays don't appear to be manufactured any more, but they are available. Here's one place:
http://www.aliexpress.com/item/CR2-12V-NAIS-TWIN-POWER-AUTOMOTIVE-RELAY/32235941300.html#!
It is a Panasonic part, and if you search CR2-12V, you'll get many leads.