Absolutely. It’d be especially nice to see the Empire’s post-Reaving lists include some of the Omni designs that were associated with the absorbed Hellions and Mandrills—Linebacker, Black Lanner, Crimson Langur, etc. The Langur in particular would be a great fit for the Seekers.
Linebacker used to be on Imperio list and it was the ride of choice for Khan Rood but I doubt they had too many of them since they are off the current list, they either fell or are in storage
Even Rood's Linebacker was isorla from operation ICE STORM (that particular one is probably in museum now, Rood turned out to be quite a historic figure)
Black Lanner and Crimson Langur are unlikely but you never know down the road what scientists will dig out from archives, wouldn't even be first time for them
Ice Hellion designs however are all the rage
Snow Fox Omni project was restored and completed and it has displaced Fire Moth as Elemental taxi in Scorpion military
Hellion is staple light Omni mech of Goliath Scorpions now, it's built on Valencia
Even Drift Shag is still in use although it's highly unlikely that it's being built, Icestorm was in service for a while before getting mothballed
I already mentioned that Ice Ferret is such a trademark Ice Hellion mech that it would be a plot hole to not have it built by Goliath Scorpions. Blueprints, machinery, personnel, they got all of it
Another tidbit worth noting is Viper, there were three MODULAR MOBILE factories which built it, Ghost Bears relocated one to Dominion while other two were later captured by Goliath Scorpions and Ice Hellions which means that eventually Scorpions not just one but two mobile Viper factories so odds are good that Viper is also in production in the Empire and has been for a while