I'd guess it's from Pendleton but I couldn't find it anywhere.
Or some Japanese version?
Very likely vintage Pendleton. http://vintage-babydoll.ocnk.net/product/272 here's one in the same pattern. Might be able to find something close on etsy.
Ah, yes. That seems to be the answer.
Thanks a lot.
The fabric of the one you linked to seems to be the same. Just the collar is different. In the one above it's probably shearling lined.
This RRL one is similar.
Etsy is a good idea.
This one was available there.