This tileable blueprint exports five buildings that are produced by your mall, but also imports them. This allows you to request a building on some remote planet you're working on, but then send any leftovers back to your mall.
The leftover buildings are buffered and are prioritized over new production, so your mall will not produce new buildings as long as there are still leftovers in stock.
Usage:
Connect to power, and connect both ILSs to warpers.
The ILS closest to the numbered inputs is the recycler. Set it to five buildings, leave the product limit at maximum, and set to "local demand" and "global demand". Give this ILS vessels but no drones.
The other ILS is the exporter. Set it to the same five buildings on "local supply" and "global supply", and set the product limit to the number of buildings you want to receive when you make a request from somewhere across the cluster. Call this number L. This ILS should also have vessels but no drones.
Set each storage box capacity such that it can hold somewhere between L and 2*L buildings. This depends on L but also on the stack size for the specific building it is buffering.
Optionally, change the alarm icon on the traffic monitor to the building it is monitoring, so you get a more specific alarm if any of your buildings becomes unavailable.