I might accely have a 3 light chase controller.(had like 10 sitting im my parts drawer i think) There accely used in signs like the las vegas ones.(I live in vegas) I can probably part with one or 2 if you need one.
Also the star "explodes" so there should be 2-3 segment in the star that get bigger.
Edit or not: there for low voltage ac no idea what input voltage is. Still you can probably throw something together yourself. a decade counter a 555 (or a few transitors) and you got yourself a circuit to trigger a optoisolator and a triac.