I can pay you back for helping me with those translations
What specifically are you looking for? Period documents, or are transcripts okay? On what subject? The best site out there for archive stuff is U-Boat archive, which has an ever-growing collection of KTBs as its main attraction but a wealth of other info.
http://www.uboatarchive.net/
Of course
http://www.uboat.net/ is a good one for info on things like individual boats, commanders, dates, sinkings, tonnage etc.
If you can't find what you're looking for let me know, I've got a pretty big library of U-boat books I'd be happy to look some stuff up for you.