CT 2 questions about Vader's flight suit & TIE fighters windows difference in Episode IV

Does anyone know any image of the Vader's flight suit wore during the Battle of Yavin? I have seen many Vader's costumes and dolls out there. None of his flight suit. By the way, I'm looking for one image better than this:

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http://www.loresdelsith.net/universo/imperio/cazas/bin/tiead2.jpg​

And Why TIE fighters windows are different? What happened during the filming of Episode IV? You can see the difference below:

https://lh3.googleusercontent.com/-...windows%2520cockpits%2520TIE%2520figthers.jpg​

 

He's not wearing a flight suit, only his normal life-support armor and robes

http://www.darthjoe.com/wp-content/uploads/2011/07/P1001150.png

 

The first picture shows the front window as seen from the TIE fighter's inside and the second one from the outside.

 

Given that his armor and robes were initially intended as a space suit (he only started wearing it all the time because Lucas really liked the design) I don't see why he'd have a separate flight suit.

 

A mistake happened. The TIE fighter windows is one of many inconsistencies.

 

You'd think the snowspeeders' cockpit was transparent and the Rancor had massive black lines all around its body, the way these movies can be sometimes.