Places like GamingRing or older PES editing forums sometimes have archives.
Look for the PSP folder (on newer Android versions, this might be located under Android/data/org.ppsspp.ppsspp/files/PSP/ ). Open SAVEDATA and paste the save folder inside. Troubleshooting Common Save Data Issues pes 5 psp save data
Download a file manager app (like ZArchiver) to extract your downloaded save file. Copy the extracted region folder. Places like GamingRing or older PES editing forums