Hello, i have this one: http://www.pvas.no/lyddempere/pistol/a-tec-pmm-6-9mm
Looks like they are sold out now, but you can give them a call. They are slow to reply on e-mail.
Its good quality silencer, its also made in many pieces so you can make it longer or shorter as you wish.(screw on/of pieces)
Here is a search on their homepage(A-Tec) after dealers: http://www.a-tec.no/naermeste-forhandler