Where to get new front disc for my -67 Barracuda

Hello , can anyone inform where to get new front disc's for my Barracuda. My Barracuda came out from factory with front disc's installed. Disc outer diameter ruffly 11" with small (5x4,0") bolt pattern. There start to be some vibration and I don't know where to get new ones?

If I am right those are Kelsey-Hayes styles brakes, are those anymore available or is there easy swap of those?