I believe gibbs rifle company sells em for right at 1k$ an authentic one will run you 5-7k$ IF you can find one that isnt a fake. Gibbs uses rewelds and parade recovered receivers.
The real downfall of american sniper rifles right up till now has always been terrible scopes and the 03a4 was no exception. During the late 60s and early 70s it started to turn around but it wasnt really until the late 80s we starting having decent optics.
If you really gotta have the a4 look gibbs is prolly the most cost effective and you wont be hunting down a collector rifle to tear up that would prolly run the same in money just for the base platform to build off.
Repros have little value to anyone that collects war rifles.
The other option is hunting around pawn shops for a poor 03 that someone bubbafied and build your own.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent