I'm recommissioning a '71 Traveller for a friend of a friend - long story! - and most of the mechanical work's done.
The lower window runners on both sides are toast and a previous owner had filled the obviously rotten joint between the RH end post and waist rail.
Took the side windows out today and had a delve:



The owner's on a tight budget, but these two sections look pretty terminal to me - is it possible to replace them without disturbing the rest of the wood?
The RH lower door rail is also gone - again, can this be replaced on it's own?

Thanks,
Stan