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Coriolis is ... not as old or fleshed out as Pathfinder/Starfinder, Forgotten Realms and the like that have lots of splat books and illustrated monster stats. 

Coriolis isn't publishing an adventure path a month.
The quality percentile of all published material from FL is 96%+.
The quality of percentile of all published material from ~finder is ... ... ... not that.

As you and others have pointed out to the original questioner: Paper minis are easily and readily available for anyone who wants to do a little work for themselves.
The publishers are not likely to produce anything like that for some time (if ever) to come.

Very late to this discussion, but, as a new Coriolis GM looking for additional thematic art, in addition to artwork from the Coriolis materials, I've found some images for Dune that seem evocative of Coriolis. Might check out Pinterest, for examples.  

Also can find a bunch of pre-made battle mats that might work, such as The Big Book of Sci-Fi Battle Mats Map Bundle, which can be found on DriveThruRPG for less than $5 USD (at this posting); these can be printed our used on a virtual table top platform.  Or if you were really motivated, you could create your own with something like ProFantasy's CC3 software package with the Cosmogropher 3 add on (although this admittedly has a cost and learning curve associated with it).