Is the product you're offering on Amazon offered by Amazon itself, a reputable third party (i.e. Circuit City, Target, etc.), or an unknown third party (ZShops, auctions, some store you've never heard of)?
If it's offered by Amazon itself or by a known third party (it'll say who/where it's shipping from after the "usually ships in suchandsuch days from thepeoplewhoshipit"), I'd send an email back to Google explaining that it is most likely not a "replica item."
If you're promoting a product that's likely a forgery (good examples would be high-end watches, certain brands of expensive sunglasses, or pretty much anything else you'd expect to buy off a guy on the street corner), ESPECIALLY if it's from a non-reputable third party, you may want to look at something else, as Google is probably right. Since I don't know the concrete details, I'll leave that decision up to you.
Also, as a separate note, due to the change in affiliate rules, you may want to look into starting a website to promote amazon goods. Right now, only one advertisement is allowed per domain per keyword, so if somone has an amazon ad that performs better than yours on a particular keyword, your ad will not show. Putting up a website, while somewhat expensive, allows you to send people to your own site without having to worry about getting bumped out by another advertiser.