On my phone so quotes don't want to work well. I ground them close enough that they have to be pressed in. I was also considering a little double sided tape. Yes that is where I got them from an I missed any other questions I'll answer them when I get home.

Looks very nice! :)
Makes me want to get another 780 Classified and SLI them with the bridge haha.

I just wanted to post an update on my mod I did inspired by CAxViper's idea.  It turned out really well and I am pleased with the results.  I obtained the same samples he got from this web site:
http://www.tapplastics.com/product/plastics/cut_to_size_plastic/acrylic_sheets_transparent_colors/519
 
I ended up getting one of each color, although I would not recommend getting the darker versions of the colors because they lose something in the illumination from the white LED's on the bridge:
The darker green:
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Versus the light green:
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Here is the larger picture with the 2 shades of green:
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I cut it in a similar way to CAxViper's cut/dremeled, albeit not as cleanly.  The main cut was done by scoring the plastic and using a tile/plastic breaking tool I had:
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You need to make sure you "dremel" around, on the 1/8 in plastic insert your making, where little black connecters are from EVGA logo.  This will ensure that the 1/8 inch plastic insert fits flush with the inside of the logo.  If you do not take into account the black connecters (in the corners) on the bridge cover, the bridge will not lay flat when you try to reattach it.  The green is this picture is the darker green ( my first run).  I did not take pictures of the lighter green which shows much better in my opinion.  It fits pretty snuggly in there so you really don't have to worry about it moving around.
 
I suppose you could remove the EVGA plastic insert and just use the plastic but I did not feel like hacking up my bridge.

And the view with the panel on the 900D:
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Glad someone got good out of this. Mine is still sitting on my desk since msi has a terrible shroud design 

It would be great if they could make a version where the light source is RGB and the colors could be changed easily.  Not sure if that is possible with the structure of the added features of the 780/Titan's that allow for the light up bridge.
 
However that would take all the fun out of doing a simple mod I suppose.   
 

Nice photo's mpoffo, thanks to the both of you for sharing the details of your work.

you dont even have to buy any colored plastic sheets, just cut up a green seven up 2 liter soda bottle  and bam instant green :D if you wanna do it ala cheap, 2 liter bottle costs like 99c 

Wanted yellow and could not find yellow plastic, so I used an old cell phone screen protector.  Colored it with a yellow sharpie and cut a small piece out of it.  Did the same with my Hydro Copper blocks after switching the LED's to white.