New CD key for LoA??

So after a move, I found out that I lost my LoA CD key. Thought for sure that is it was contained in the little CD slip/envelope thing, but turns out that it was actually in the user manual that comes with the box.
And, of course, the manual is what's missing. Typical.

Short of resorting to key-gens/pirating or buying a whole new game, how do I get a new key? Is there somewhere I contact to have them send me a replacement? Fat chance I know.. YEARS LATER after everything goes away, but this game was supported by Microsoft, right?

Oh, and by the way, that "complete DS collection" deal on Steam was the biggest load of poo-poo porridge hoopla I've encountered in ages. Sure had me fooled that the expansion packs were included with the games.. bucket of dren.