My old shower door had a small leak on each corner. I pulled the door so I could recaulk everything and make sure it was perfect. However, I saw that the door was in a lot worse condition than it looked from the outside, so I decided to get rid of it and purchased a new door from lowes. For the new door as well as a silicon tube, I was around $280 after tax.
This first picture shows something I had to modify in order for this new door to fit in place. You can slightly tell from the picture, that corner isn't L shaped. It's actually closer to \_, which makes it a lot harder to mount an H shaped piece of aluminum. So I put it on the table saw and cut off one of the legs of the H, leaving me with a 3 legged piece. Then I used some plastic board also from lowes and planed it down to the thickness I needed, and did a 45 degree chamfer on the edge to make sure it sat flush in the required spot. By doing this on both sides, it allowed my shower door to mount perfectly into the available space that wasn't intended for that type of shower door.
And here is the completed shower door. The glass is clear, but has these frosted vertical lines down the middle. You can easily see out, but it's harder to see in (everything is blurry).