I will ask the manufacturer for pictures but you can use the 6.0 as example.
Look at an SV ART modified 99VT interior here below on the pics, it is made in Kevlar.
I don't know if the SVart is still available in the market, guess not but I had contact with FGP fibreglass located in Poland that offered it in glossy Carbon for about 800 Euro if I am correct. But FGP is very slow in their communication, I asked pictures several times and they hardly reply so it seems to be that paying them in advance (what they require) is not a guarantee for receiving the payed parts.
No matter how the tunnel would look like, a good idea would be to wrap it in a custom (carbon?) color, same for the dash, to make the interior 100% matching and new. I think in the meantime, the last years, the quality of foils have become at such a high quality level that this is a serious option. In fact sometimes I find imitation matte 3D Carbon foil better looking than real Carbon.
I have already a carbon dash but I think when installing a new glossy tunnel, the dash would need a new gloss too to make it match with the new tunnel.
Also the leather Pad on the tunnel should be custom made. Or leaving it is also a possibility. This would be again a Diabvlo mod, which is imo a very nice one, as it would improve the looks over the standard leather tunnel very much (I say sorry to original lovers)
If anyone here has experience with FGP I would be glad to hear.