Napa, or we just got the same brend for a 1470 case which I bet is the same from elmersrepair.com
Call and ask for Dan he seemed to know what fits what, there mostly a case/international salvage yard/ reproduction parts, but sell oliver, MM, allis, Massey, ford, and Deere stuff as well.
And I'm pretty sure ours has the same casting number as that. If you tell them the number, they will get it for you. You just need to know if it has brake fluid or hydraulic oil in it, guess there's two different ones.