Although I'm not in the fake business, I wouldn't spend time doing a cast of such a rough and worn example. Otherwise it's most probably been doctored Just my 2 cents Q
If is indeed tooling, I would not touch it unless maybe it was cheap, like say $10. But I may avoid it anyways at that price.
Yes, very blatant. Look how the whole coin is corroded, yet magically in the middle great details emerge. Also look around the center designs, you can see even via photo how they have massively moved metal on the surface.
you can buy from ebay, if you want i can mail a list of coin dealers some also active on auctions and vcoins so....
http://stores.ebay.nl/Solidus-Numismatik http://stores.ebay.nl/gitbudnaumann http://stores.ebay.nl/NUMISMATIK-LANZ
http://stores.ebay.nl/pharaoh-crypt http://stores.ebay.nl/savoca-coins http://stores.ebay.nl/Dionysos-Numismatik