Sort of on the same subject guys....
The backbox of my new Space Invaders does not have a lock assembly on the right hand side.  I cannot locate any pics of how this is supposed to lock in place.  Does anyone have a pic of the backbox lock machanism and assembly (lock / bracket, and whatever is needed on the backbox door to catch the lock) please.  I think I am missing a few pieces here and will probably need the whole mechanism

Does anyone also know where I can buy these?
Regards