I'm assuming the Luminus Devices LEDs are intended for projector applications (shhhh, I'm at work....) so perhaps you might consider the Osram OSTAR Projection Compact LE CG Q8WP-8N7P-1 to replace the single die, and LE CG Q7WP-6Q5R-1 to replace the two die product. They have ~10% less rated output but they might actually be available.
That 700+ lumen narrow beam 1mm2 die Luminus was looking really promising.
Promises, promises...
Too bad it's vaporware.
I'm assuming the Luminus Devices LEDs are intended for projector applications (shhhh, I'm at work....) so perhaps you might consider the Osram OSTAR Projection Compact LE CG Q8WP-8N7P-1 to replace the single die, and LE CG Q7WP-6Q5R-1 to replace the two die product. They have ~10% less rated output but they might actually be available.