S1 supersport exhaust wanted

Hi mates!
I’ve been shocked these days after recieving my friends K-series Elise S2 Hangar 111 exhaust.
Only 3,5 kg of weight! How can that be possible!!! Now I wonder, are there any such lightweight exhausts avaliable for S1 Exiges?
As far as I know Junspeed Supersport weights about 8 kg, and it’s out of production now.
I’m now on a double-pipe standard exige exhaust.
Btw, maybe someone is selling his supersport Janspeed exhaust?
Cheers

i have one £150 + p&p

PM sent.
If anyone has one for sale too, I’m ready to see your offers.

Someone please sell me lightweight and really loud sport exhaust for my Exige S1.
Db doesn’t matter. The lighter the better.