I also have a DD headlight assembly on my '05. This is the best upgrade I have done.
I was very luck and found my DD, in the correct color, on E-Bay about 3 yrs ago.
I had install questions so I called DD. What a great experience talking with the owner.
I asked him why he was ceasing production of this great product. He gave me several reasons:
Too many colors, he had trouble keeping up with the color changes.
And, the one I found most interesting, was LT riders bitching about the cost. It's been a while but he said something like "some guys spend $20,000 for a motorcycle and bitch about paying $300 for an upgrade."
From my experience it has been the best bucks I've spent on my LT.
If you can find one, buy it, you won't be sorry.