I installed FMS recently, and found two models that fly/look like the aerobird. One is the firebird and the other is the skywave. The firebird seems closer as it doesnt have ailerons. I havent actually flown my real aerobird yet - got it just today, but the simulator is great, especially considering its free. I use my realflight controller with it. It may be less useful with the keyboard.

Anyway, I cant remember where I got the model specifically, it was probably from one of the links on this page:
[link=http://rcp.web.infoseek.co.jp/fms_e.html]http://rcp.web.infoseek.co.jp/fms_e.html[/link]
(Click on "MANY MODELS")

But if you cant find it or dont want to look, PM or email me and I'll send you the files. Hope thats not illegal!