Replacing some of the screws may not be that difficult. If you have means to measure the screw pitch, OD and length you may be able to contact a gunsmith who specializes in repair of older guns and see if he has something on hand or can make one for you. The problem may be that the pitch is not of today's standards and accurately measuring the pitch could be a problem.
As a suggestion, use what you would put in a college fund to buy up all the old guns you can now and use them till your kid is ready for college. Then give them to him to either become a gunsmith or sell and get an education
