'Old PPL papers' are NOT generally available. The current sets of JAR-FCL PPL exams are issued directly to responsible custodians at RFs/FTOs.
It is an offence to pass any CAA exam papers on to unauthorised recipients and if caught, those responsible may be refused entry to any other CAA examination centre.
Certain publications which are generally available will, however, prove useful revision material for those studying for the PPL.