AromaPathGreetings all!
I believe in perfumery base notes are more projectory and long lasting. If you want to hear more plum notes in your scents then look for plum ingredients in the base and middles notes.
Perfumo have great data base.
Here is list of my personal favourites:
1. “Feminite du Bois” by Serge Lutens
2. “Boxeuress” by Serge Lutens
3. “Bois d’Fruits” by Serge Lutens as you can tell I’m his biggest fan 
4. “Poison” by Christian Dior
5. “Hypnotic poison” by Christian Dior
6. “Liassons Dangerous” by Killan
7. “Single malt” by Killan
8. “Naughty Fruity” by Mugler
9. ”Ume” & “Bohemes” by Keiko Mecheri
10. “Valentino Donna Noir” by Valentino
11. “Declaration Splendide” by Terry de Gunzburg
12. “Dark purple” by Montale
13. “Bullion” by Byredo
14. “Decadence” by Marc Jacobs
15. “Aziyade” by Parfum d’Empire
16. “Kenzo World Intense” by Kenzo
17. “Love is in the air” by House of Sillage
and many more...
There are no pure plum essential oils, it is all combination of ingredients that play with your imagination. Keep this in mind too. 
Wow, that is a long list. Love it
i haven’t try neither of the ones you mention, but I definitely will in the future. Thanks for the ideas 