FujiNet v1.0 devices are currently being built in small batches. The hardware is open and if you have the capability, can build your own. Several shops have begun selling the hardware: Brewing Academy and Vintage Computer Center in the USA, and Zaxon in Poland. Hardware will also be available here when new versions are produced.
NOTE: There are some issues with v1.0 hardware that prevent it from working on the 1088XEL. More information on github.