No problem. The 845 long cage rear derailleur is the hardest piece to find in my experience. I actually managed to find the main body, complete with gao dakar decal and mated it to a medium cage from an 841 Road mech. If you can find two would you let me know please?
i have a front hub in silver built onto a wolber tubular rim ( with tubular tyre glued )
and the body of a back hub , silver . also have plenty of nos wolber tubular rims and tyres if you wanted to build a matching pair .