Did some extensive work on the Pipe Makers section of the Uilleann Wiki tonight…much larger list, with links to the websites I could locate. Maybe this will help someone when searching for a maker to buy from? Or just us pipers who have nothing better to surf on the web… 
Anyone who knows more about the pipemakers listed…feel free to contribute!
Your list is incomplete.
2 - L’s in Uilleann
another pipemaker list is here:
http://uilleannobsession.com/links_makers.html
You know, I did have Marc Van Daal on there, and the page didn’t save…had to start over, and had less time to do the list again…I will put him there when I get back to it, unless someone wants to put him in. 
By the way…I listed the pipemakers alphabetically, to avoid bias.