A majority of the Mopar SSBC front and rear disc brake kits utilize early-late Ford Mustang/ Lincoln/ Mercury/Turbo Coupe Thunderbird components, stock or modified for the SSBC kits
A little research will yield you the components you require, you can source the rotors for your application from Summit Racing PN#s BR61053 for "stock replacement" rotors, if you have/desire drilled/slotted rotors PN# BR61053LC
Note: the Summit rotors will be in the stock Ford/L/M 4.5" BC, you'll need to have them drilled for the Mopar 4" BC depending on your SSBC A153-/1/2/3 kit designation (application is 1965-67 Ford/Mercury)
Calipers are 65-67 Ford Mustang Kelsey Hayes 4 piston, readily available from many sources, if you have the SSBC proprietary cast 4 piston aluminum calipers your SOL (source:used/rebuilt/Ebay/etc)...however the Ford 65-67 Mustang KH 4 piston calipers are an bolt on alternate source
Pads are D11 or Bendix SBC11