Does anyone recall the White Dwarf number that had the Amazon army list for 3rd Edition? I know there is a really useful website somewhere that has an index of all articles and Warhammer publications by edition, but I cannot recall the website address...
The Warhammer Armies project has a list for Amazons. Its a compilation of anything written about the Amazons in Lustria so it should give you an idea where to start with building your own list. Its free to download and you can find it on Scribd or just google it.
Unfortunately it's a pale mockery of what the Amazons should be, no bolt pistols for a start and all the artwork falls into the soft-core fantasy pinup dross so deftly avoided by Halliwell and Blanche in the original conception. Nerd-rage!
As Thantsants said the best source is the Riggs Shrine scenario, and along with the 2nd Edition Bestiary and the brief mention is 3rd is the full extent of official Amazon coverage. I'd give them sea-elf and slann allies, but that depends on the timeline.