R. Roller letter to R. Schroder - II./JG 3

[JoeHackett]

In the book Fliegerhorst Schiphol Vol III. by Ab A. Jansen (pg 144-145), the author mentions a letter written by JG 3 pilot Robert Roller to the family of Lt. Rudolf Schroder who went MIA on 18-Oct-43. Jansen writes that he received a photocopy of the letter from the Schroder family back in September of 1993.

Might anyone have access to or be able to provide suggestions as to where I could obtain a copy of this letter?

The reason I ask is that in the letter, Robert Roller describes his attack on a B-24 Liberator - the very Liberator that my cousin was flying in. My cousin and his 9 other crewmembers are still listed as MIA. Their bomber, B-24D 41-23729, is likely at the bottom of the North Sea.

Thank you in advance for any help you can provide!