B01357/S0123 has a period-six 2c/3 replicator, consisting of a block of two cells:
Three parallel tracks of these replicators can interact to form an 8c/24 spaceship:
More curiously, three perpendicular tracks can also form a spaceship, again moving at speed c/3 but with period 12. The replicators from the middle track stop the backwards replication of the other two tracks, destroying themselves in the process, but are reformed from the resulting debris.
Replicators -- Cellular Automata -- D. Eppstein -- UCI Inf. & Comp. Sci.