It took me forever to find my Elven archers (not really- more like only four months) on Ebay. I had to wait for several Chronopia "Army Lot" auctions to come up for bid, and I actually ran across a set of four described as "Elven Archers-Warhammer" (they had no description associated with the Chronopia game at all).
Tell your friend to keep his eyes peeled as they do not come up that often. I'll keep an eye out as well and let you know if some come on the market.
And besides if all else fails... You can check in with the "Pewter Prince of Pimps" aka Topkick here on the Forum, he might have some hidden away.