5 or 6 digit New Haven rifle, going to build either a .358 or (more likely) a .284 Win.

Condition doesn't matter much as I only need the action. That being said, no rust or pitting on the action please.

Any leads?

The usual suspects. Online resources like gunbroker, etc, etc and your local gunshops.

I would love to find one too. I would really like to have a M70 action with one of my favorite calibers, the .350 Rem mag.

For a 350 RM, you'd need a WSM action.

I have one that I could spare. Send me a PM if you're interested.