I believe it's a common misunderstanding that the Deere made by Yanmar is the same parts as a Yanmar grey market. As pointed out, the Deere are made to Deere's specs, not Yanmar's painted green. So I don't believe there are cross references for interchange of parts, for the most 'part'.
Deere has been working with Yanmar for years, and one can bet that the deal would go down that Yanmar wouldn't be able to sell the same tractor off the line with Yanmar's choice of color.
Not sure what "Yanmar" you have or where it came from, but something gives you the indication the parts are interchangeable. Could you let us in on what that 'something' is? Thanks