Not sure why they need you to prove there's interest, since these are a production item. https://www.gunmart.net/gun_review/weihrauch_hw95k for sale in England.Hopefully that link will work. Is it something to do with importing them here? That review has the specs, barrell length weight, etc.
After the terrible shooting barrel on my threaded HW100, I wouldn't have one. They use a very long threaded portion at the muzzle, and on mine it was bellmouthed. The choke was non-existent and there was no resistance through the threaded section. It shot terrible. I've had this happen when machining barrels myself, so I believe it could be more than a fluke. Factor this little deal with the fact that the silencers don't really do much, but add unnecessary length, and I wouldn't be interested. Furthermore, knowing how AoA operates, they will want a hefty premium for them. No thanks for me.
Why should I want a 95K with a glued on moderator when I have a 98 with an HW silencer?