FX FX Dreamline "power pup" 80cc plenum

Hello Folks - I have a Dreamline Bottle Pup coming, but it's the European version without the 80cc power plenum, its got the carbon fibre bottle but it is mounted on a spacer between the bottle and the regulator, rather than the plenum between the regulator and frame. I'd like to add the 80cc plenum if possible but where to get one, my Google googlefu isn't providing any answers - maybe they are not sold separately? I can find the 17cc and 45cc plenum extensions.
 
Hey thanks for that Loff. Your videos are great (you've got a new subscriber!).

I see in one set up if your dreamline you have a long "stack" of the 17cc plenums - did that work OK?
Hey, thanks for subscribing!

That stack of plenums did not work well enough for me, so I decided to swap that 4x17cc plenum stack with FX Maverick second regulator tube. I'm going to build dual regulated Dreamline :D