MP5 selector switch compatibility

[redzaku]

my first gun, a G&G MP5 SD6, during a game, started to fire full auto during a game but i was not holding down the trigger, so i disconnected the battery and when i got home, i figured the trigger switch was getting stuck and took it apart, throughout the night i stayed up to try and put the gearbox back together, and once i did, i managed to stripped the tiny screw in the left ambi safety. now the replacement for a new one is quite expensive but i have heard that TM mp5 selector won't fit but a cyma selector does. will it though?
thanks all