The amount that is asked, is only for scanning the document, it is probably not allowed to sell manuals or publicly distribute them electronically, as these manuals are possibly copyrighted. This amount is what the bookshop asks to pay.
By the way, I do not think the amount is that high, since this is the original manual and everything is there, even the tiniest transistor or how to perform the measurements.
There are some information about replacing the most faulty part, the belt, with an exact replica, this information has been posted on the discussion forum there.
BTW I am looking for info on the external mixers for this radio, any info will be appreciated.