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Thunderbolt/Displayport/HDMI extender

Greetings from italy!
So, I've been lurking for the past two days about replicating Linus personal rig setup at my home, but I've hit quite an obstacle.
I've got my computer in my room, 4790K@4.6GHz, 16GB RAM and 2x980Ti Strix (well, only one used ATM, since I almost hit OCP on my CS750M with both GPUs under furmark. A RM1000i it's on its way. And maybe a Thunderbolt equipped MB if this thing exists), and a LG 43UF776V in the living room, which is capable of 4K@60Hz 4:4:4 over HDMI 2.0 but has a terrific 55ms input lag (not good for gaming, but it works. Kinda. At least the picture quality in-game is astonishing). The two rooms are 7-8 meter apart from each, center to center.
So I searched for Thunderbolt extenders (over optic fiber would be ideal, since i could insert that between electrical wires without fear for interferences, even if it's not the best thing in the world..), but the only thing I found was the corning cable used by Linus which would work, but it's quite impossible to insert that (actually the cable would fit, the connector... no way) in the existing FREAKING SMALL ducts used in my house.
Just for reference, I ran cat6 cables in an existing duct between the living room and my room, and midway through the run, two cat6 and an antenna wire SEIZED UP for good. Tried everything, eventualy I ended up tearing them (actually that was my dad's brute force..).
The only thing i could do was.. This.
IMG_20151228_121328.jpg

And then re-run the three cables with a $h!tton of lubricant. Eventually it worked wonderfully this time, and while I was in there..
IMG_20151228_131211.jpg
IMG_20151228_155019.jpg

IMG_20151228_161830.jpg

Oh yeah, no more cables around the wall! Just 5 patch cords under the router:

12496392_1121556471223133_3118396059902891875_o.jpg

 

Back to the topic: Given my situation are there any Thunderbolt extenders, or even Display Port/HDMI extenders (then I would also need a USB extender..) that use a cable which is possible to insert in small ducts (e.g. optic fiber)?
Or I may as well build another rig to play at 1080p in my room (given the cost of some Display Port/HDMI extender over fiber optic..!) and move my main build to the living room?

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No cable is going to be smaller than that corning one. Ever. All will have ends even larger than it.

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Of course no pre-made cable would ever fit.
But, If I had 700€ (EEK) to throw at these: http://www.lindy.co.uk/images/300m-fibre-optic-hdmi-4k-extender-p1584-2077_image.jpg

300m-fibre-optic-hdmi-4k-extender-p1584-2077_image[1].jpg
It would be theoretically possible to insert a multimode optical fiber between the electrical wires and then terminate it at the ends with the appropriate connectors (which, by the way, needs proper tools).
Of course for 700€ I could build another computer and use that to game in my room.

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