There was an error with the MechLab Warehouse after the patch that caused the OmniPods for all Viper variants to appear for direct purchase for all Viper owners, including those of the Medusa and Reinforcement variants. The issue with this is that if you only owned the Standard or Collector Pack, but not the Hero or the Reinforcements, you could simply purchase the OmniPods of those variants and equip them onto one of your owned variants (excluding the CT).
The initial fix for this mornings issue involved the removal of all Viper OmniPods from the in-game Warehouse, which is why you no longer saw them available for direct purchase.
With the way the in-game Warehouse system works right now we unfortunately can't restrict OmniPod availability per-user according to their owned variants. In other words we can't activate VPR-M OmniPods solely for owners of the Medusa.
While we can't make the Hero and Reinforcement OmniPods available for purchase in-game for the above reason, the VPR-Prime, VPR-A, and VPR-B OmniPods are now available again for direct in-game purchase by owners of the Standard or Collector Packs.
Every Viper owner has those three variants; there is no need to limit the acquisition of their OmniPods.
Unfortunately, the VPR-C, VPR-D, and VPR-M OmniPods will not become available for direct in-game purchase until those 'Mechs release in-game for purchase, regardless of whether you own the associated Hero or Reinforcement Add-On.
I will be following up here to examine if it's feasible for us to introduce per-user ownership filtering for the in-game Warehouse in the future, to allow for OmniPod purchasing by owners of the associated variants.
tl;dr
The VPR-Prime, VPR-A, and VPR-B OmniPods are now available for direct purchase in-game.
The VPR-C, VPR-D, and VPR-M OmniPods won't become available for direct purchase until the Viper 'Mechs themselves release for direct purchase in-game.

