Try IGB Austria. They do a Glock mount similar to the SJC. It mounts on the front rail and has an extended pin through the trigger at the rear. They will send one to Estonia no problem. I have one and have had no problems with it.
http://www.igbaustria.com/
Have a look.
This mount looks just awful! I spent a lot of time and made my drawings, mounting similar to SJC.
Soon I will get the first sample which to me make on a CNC machine.
Now I have almost all the parts for the open Glock. And a very nice titanium compensator. It remains to obtain only mount...
I agree the IGB mount does not look pretty, neither do Glocks. However they WORK superbly just like Glocks !