I have a Joker coat I bought from a company out of Asia for only $100 and it is not completely accurate, however it's still good enough to not justify upgrading to another, more expensive coat at this time.
Honestly, the only real details my coat is missing is accurate buttons (and if anyone knows where to get those, fill me in)
The color is good, but it will always be hard to match up these things without direct study of an original coat.
As far as Indy Magnoli goes, I have several of his Joker pieces and I have to tell you, his product and service is some of the best I have ever dealt with while purchasing online. If his coat is priced in the stratesphere, you can bet the quality is going to be hands-down remarkable.