NIce. Looks like a complete camera, rather than 'parts.' If the threads for the rear standard are destroyed you could drill them bigger and use the next larger size screw, like M4 or whatever. Or, try to restore the threads, though these kits might not come small enough diameter for that repair if you want to use the original screws, plus they are going to be too long. As you see there are not many threads to hold that together, because the track needs to slide without the ends of the screws coming all the way through.