The game was delisted from the PlayStation Store in 2017. Physical copies can still be found on eBay .
As for a ROM or portable version, I couldn't find any information on an official portable release. However, I did find some rumors and discussions about a possible PS Vita ROM or ISO file. Please note that downloading ROMs or ISOs of copyrighted games without ownership or permission is against the law and can harm the game developers and publishers. the amazing spiderman ps vita rom portable
When someone searches for a they are typically looking for one of two things: The game was delisted from the PlayStation Store in 2017