It looks like Sram is discontinuing the Omnium crank:
https://www.bikeforums.net/singlespe...am-omnium.html
Reportedly Shimano is stopping production of DA track cranks because the equipment broke and they don't feel it's worth the cost to repair it.
3T has discontinued the Scatto.
And Mavic's in receivership, so the whole company may disappear, bringing the IO with it.