Drum Brakes for front

I have a 74 Dart Sport with different lug patterns front and rear. I would like to have matching so I only have to carry one spare tire. I have 5x4 drum brakes on the front and I am looking for 5x4.5 drums to swap out. If anyone has any or knows where else I could look please let me know. I keep wondering what everyone does with there old drum brake kits after they swap to disc. I am located in North Georgia. Thanks