Craig, replica ferrari manufacturers have had to go underground in recent years as ferrari is aggressively pursuing any replica manufacturer copying their shapes/designs by using their trademark and patent protections.
I've only seen a few gto copies that don't cost $500,000 or more and they're pretty crappy. The body isn't the right scale - looks about 7/8th scale - and the details are all wrong. There have been a few gto's cranked out that are almost exact copies but the build costs were five or six times what you might pay for a good GT40 replica. One of two of these ferrari copies have been passed off as original only to be discovered as a fake down the road with the inevitable litigation following in its wake.
There's an english Lord who owns an original gto who commissioned a very expensive copy which is identical in all respects - it's what he drives around and takes to the track when it's OK to race a non-original car in vintage races.