If not sold and if you accept to ship to Europe I offer 150 $ (plus shipping)
I think those need a setup like the lvl10 bolt o-ring with sizers, they are very sensitive to fit and wear. Now that I say it, I might be able to do
The only barrel kit that I would ever use instead of the Empire kit would be a Stella or Lurker. The Empire kit really is a great barrel in my opinion.