General Electrical eletrical box screw? Does anyone know where I might be able to find screw for...

Does anyone know where I might be able to find screw for the door for a General Electric electrical box/panel case? It was made within 1974. Model is 0574 P-150. All I need are the screws for the front panel/door to attach to the box. I feel they were accidentally thrown away.
Answers:    If you can't find the specific screws at Home Depot or Lowe's, try an electrical supply house. They will own the correct size and type of screw you need. Otherwise, you can use a self-tapping 1/4"-20 screw. Hope this helps.
any hardware store will hold some..