Sorry 'bout the ugly-looking page. Here ya go again.
I found 2 sites on the WEB. WEB Electric Supply. Click on the 'Home Applications' URL and there a mentioning of the Heath/Zenith Motion Sensor Lights. I suspect if you go back to their main WEB page and contact them, you'll be able to order it. It didn't look to see if there's an e-mail address you can use at their site.
Another WEB page that has contact info is Motion+Sensor Abstract. It's a short dissertation on what you're looking for. There is an address to contact for info.
My best to ya and hope this helps.
BTW: If you can remember as a kid a company that sold HeathKits, well, Heath/Zenith merged and HeathKit is no more. I loved them as a kid. :-(