The maglite website lists the part as 108-034. That number will probaly help your search. Check out this page, it might help you in ordering http://www.maglite.com/ordercatalog.asp.
Sorry. Forgot to update the page. Question already answered.
Sabrewolf has been working on custom molding them from silicone with different colors/glow options availible. Looks cool, but I am not clear if he has actually shipped any. https://www.candlepowerforums.com/posts/2697251#post2697251
Maybe PM him or post in that thread?