While I'm not answering your question exactly, I do know that my "local" Sams Club still has a lot of the Vector HID spotlights in stock. I paid ~$96 for mine almost a year ago. I was in the store about a week ago, and they are now down to ~$85. If you don't have a Sams Club membership, a friend may be able to get one for you. Also, Harbor Freight had some a while back, you might want to check their site.
Roger
PS... It appears that my "local" Sams has only sold about 8 of these lights if it is still the same pallet I bought from last year. It looks dusty enough to be on the floor that long!