Not that I know of.  I've sent in a couple of putters for stamps, loft/lie adjustments, and reshafts.  It would be cool to get them factory direct for sure, but as of now I don't think there's a way.

If you're thinking of sending in a stick, Do it!  You won't be disappointed. I rescued a TeI3 Longneck Newport from a bargain bin at a tiny shop.  The neck was tweaked, and the Custom Shop fixed it, plus they added some flavor to the stick.  They do great work.

Not that I know of either.  But, you could just order the new Scotty Cameron putter you want "stock" and then send it in for customization.  Just a thought.