This sort of literature is 'around' but it's fairly scarce and you'd have to be very lucky to find any 'by luck', let alone for the correct contract. The right contract stamping can take years to find.
It requires a fairly obsessive focus, leaving no paperwork unturned on autojumble tables.
The days of cheap original paperwork are gone. There will be the odd bargain but most 'normal' people would balk at what sometimes has to be paid.