King's Field PSone and PS2 on PS3?

I picked up a PS3 to catch on many Sony games I missed out this gen, and have been scouring PSN for PS1 and PS2 games I also haven't played. I would really like to play the Kings field games on both the PS1 and PS2.

I searched the PS Store and found nothing, but find conflicting reports that the series is, or was, availiable on PSN for download. Has it been delisted?

Thank you for clearing my confusion.

Shadow Tower is the only one that is on English PSN. Japan PSN has all the PS1 and PS2 King's Field games. 

https://store.playstation.com/#!/en-us/games/shadow-tower-(psone-classic)/cid=UP9000-NPUJ00863_00-0000000000000001

Took me forever to source a decent copy of both for myself after I got rid of them years ago. Was super lucky.