1. Maru lube can be found if you buy a Maru product that contains lube.
2. Rubik's lube can be found if you buy a Rubik's product that contains lube.
3. PuzzleProz isn't operating.
Bonus: Meffert's lube can be found on Mefferts.com for free shipping, but it is $5.
PLEASE use the One Q/A thread.