Hello, I have a polish TT-33. Long story short the hammer keeps dropping to the half #### possition each time the slide comes forward. It doesnt matter if this is done on my first shot after loading the gun or while shooting. I have to #### the hammer every round. I swapped the trigger assembly out of a russian model and problem solved. But I cant seem to find a trigger assembly for sale. Just individual parts, What should I be looking for? Thank you.