Okay guys! I have spend the last day and a half freeze framing Season 5 Ep 12, recording the TV with my handheld camera, stabilizing the video on my Mac, and searching the internet looking at kitchen knives.
I am now 100% positive on a few things. I have found the Kill Tool Roll bag and 8 out of the 10 knives in the bag.
The Kill Tool Bag is a Messermeister 12-pocket knife roll- black. This bag was not used in Season 1. Season 1's bag was a brown roll up bag, last seen when Dexter kills Emmet Meridian. The Messermeister bag was used from seasons 2-5, the only difference being, season 2-3 where they used the top. For season 4 & 5 the top was cut off of the bag to keep the bag looking "open".
You can clearly see this in the end of season 5 Episode 12 when Dexter crashes at Camp Jordan. As he exits the car you can clearly see the blue line and a yellow word (that drove me f'n nuts to try to read). Thanks to Pitbull for pic.
That is the bag rolled up as like when Dexter leaves the crashed car.
Here is a screen cap of Season 2 Episode 12. When Lila is in her Jeep after finding Dexter at her house to kill her, she opens the kill tools up. You can see netting, zippers, and pockets.
Here is a pic of the Messermeister 12-pocket. (In a different color obviously). This is the bag "opened & closed".