Check with Jeff at Simple Circuit Boards - he made several iterations of the design. I don't think the board is listed on the web site, but he'll know what you're talking about. FWIW, this effect could probably be done with a BS2 OEM microcontroller board (about $35 at Jameco and easy to program). I'd have to check the PWM capabilities of the BS2 before saying for certain, but for simple on-off LED control it would do the job. The dimming could be handled outside of the microcontroller using caps and resistors on the LEDs, much like the original LED chaser circuit hack.