There are solid alternatives and variants available for all of the current Armada ship releases (except for maybe the SSD) but I imagine the cards and dice are going to present the greatest issues in the years to come.
Well, with the bankruptcy of Shapeways being announced this week the majority of alternatives I was aware of for Armada ships will be scarcer at least for the time being. The site is still operating 3 days into the notice, but with noticeable delays and search errors, and I would not trust the two week production turnaround being quoted now.
The chapter of bankruptcy requested was for liquidation, not for restructuring, so Shapeways will not be operating at some point in the future, after questions of ownership and prior asset sales have been resolved, which means the largest distributor of third party printing services will no longer be available for the largest suppliers of Armada designs. Will those models be available from another printing service... I would say yes, but not for some time and not at the price or quality of consistency they were from Shapeways.