Wow...another opportunity. Well, here is your freebie...
check out Armen's site. This is one of the non-motorized setups, but I believe he has others. I didnt wannna take all the fun out of searching for it for ya
BTW, maybe you are talking about the empty housing, it should be there also, otherwise email him. It may take a while (read...a WHILE) to get a response, but he will email you back, be patient