Check out car-parts.com. There is a 2008 D44 off a Rubi in South Carolina.
Also you can check eBay for a D44 housing.
I just went through the research and decided that I am going to save for what I really want not and not settle. The price difference with building a PR44 and a D44 is less than $500. The PR44 is a better choice.
R/
Will