Why are there no discrete OLEDs?
Making an "OLED" and then putting it in a package, like you'd do with a Chip LED is commercially nonsensical from most points of view:


It loses its microscopic-application-advantage
It adds no flexibility advantage
It costs several orders of magnitude more
The optical efficiency is lower (due to less ideal materials for semiconduction)

Decided to edit in based on Spehro's comment above:
Buyers of individual LEDs (in most 'western' areas) don't care as much about non-Arsenic/Non-Indium, etc


So you'd end up being back at paying >=$1 for a single LED, which offers the same amount of light as a begin of the century White LED, in a package in which LEDs get made with tens to hundreds of times the output at $0.05 a piece. 

That's not really a great deal to make, is it?

OLEDs have great advantages when you use them for displays, because it's possible to grow them in a usable formation and the materials used offer some manner of flexibility (both in management/bio-factors and mechanically), but they are far from the efficiency of just making a wafer of Aluminium/Gallium/Arsenic/Phosphide/Indium/etc in whatever combination gives the best amount of light.

And "we" in "the west" still want to have the entire world for a dime, so nobody is about to go ahead and offer that deal.