Hope you are enjoying the big beastie.
I have an RD manual that I would swap, though it is not in the best of condition. Unfortunately all the pages are loose, but they are all there and in good condition including the wiring diagram. The front and rear covers have also been backed in clear sticky back plastic (like we use to do at school all those years ago). As an RD manual though it is perfectly usable and on the positive side you wouldn’t have to worry too much about damaging it further. It is possible that someone with knowledge of binding could refix all the internal pages I suppose. If you are still interested (and there is certainly no obligation) then let me know and I will take a photo and answer any other questions you may have.