Yeah, I hope you are going to buy an original, but there are only 6 and I doubt any of them are in the mood to sell .Kirkham makes an outstanding Daytona Coupe.
Kirkham's are aluminum of course, and Shelby's are fiberglass with an alloy option which is a rebadged Kirkham. The Shelby CSX cars are built by HiTech and are the evolution of the previous Superformance model. But the reality is that the Shelby CSX number on the car while it may not make you money will certainly help preserve its value. There are some other replicas, I think CAV has a good reputation, but some of them are very pricey. Used replicas show up often on www.cobracountry.com. A CSX9000 car was the second car I was looking at when I bought my GT. It happened to be a HiTech alloy version (they were thinking of doing it, so it was all hand rolled and gorgeous, built two and will do more but their price isn't competitive - 400+K the last time I asked, which means they really don't want to do it) but the boss just considered it a Cobra with a hard top.