Hey! Steve Ricks makes the most accurate coat out there, however it is VERY expensive, and he is a busy guy, so getting him to make one will take some time and a lot of money.
The coat they have on thinkgeek is a good coat qualitywise if it was only a coat. Replicawise not so good. The color is way too dark, and the cut/pattern is very different, this is especially noticable on the huge lapels. (This is the coat I have and it annoys me beyond belief.) I myself have considered getting the coat by tssy2005 on ebay. It's not very expensive, it's made to fit, and the fabric is one more similar to the real deal. And the color is good, which brings me to the next part, the suit.
I myself own the Baron Boutique suit, which looked good on photos I had looked at beforehand, but I have never once been satisified with the color. When I wear the Baron suit and the Thinkgeek/abbyshot coat together, it looks awful. The dark brown color on the coat makes the baron suit look grey in comparison.
Considering the Magnoli suit, It uses a reweave fabric that's damn near identical to the original fabric of the suit. I wish I had spent the extra money to get that one instead of the baron suit. It'll be next on my list after I have bought & altered/ made my own coat.
check out tennantsuit.blogspot.com and tennantcoat.blogspot.com ! Those are Steve Ricks' blogs, he has a lot of research on the subject!
Good Luck!