No belt loops *sniffle*
Anyway, I'd take Rohleder's suggestion. The early post war uniforms are about AS cheap as you are ever goin' to get, while still appearin' similiar. Of cource the real hard part is goin' to be the fieldgear, but I'm sure Ebay will more then accurately be able to cover that for you. (That is, unless you just want to get postwar gear to go with the uniform, then your options should be easier)
Hehe, just a warnin', don't try to fool too many girls, sometimes you run into one who knows what she is talkin' about...an' see right through you
The sad thing is she is probably not single, so your SOL.