Save Data- Accounts, Vita, and PS4

I’m planning on buying a PS Vita to remotely play games, but I have my Borderlands 2 save on a secondary account. Apparently, only one PSN account can be accessed by each Vita, and if I use my secondary account, I can’t access my main account’s save data for other games. Is there any way to transfer to all Borderlands data to a second PSN account? Sort of like the cross-save feature, but to a second PSN account?

If not, is there any way to access another account’s save game through cross save with the Vita version of Borderlands 2?