I have a brother who works at a HD here in Canada. They have a special order desk with a huge stack of catalogs. If you can find the tool in one of those books, they can order it.
When I was looking for a DeWalt DW849, I asked the people in the tool corral if they carry it. Nobody knew what I was talking about and one guy even showed me the "wen type" polishers.
I happened to find the special order desk, and i'll be damned if I didn't see the rotary on the wall behind the desk! I informed them that 20ft away, they do not know this product exists.
The moral to this story? The people who work there only know what is on the shelves. Go to the special orders desk!