Beretta Stampede parts

Howdy I have 2 beretta stampedes ,cowboy action guns.......the cylinder hands and trigger springs are worn and broken...where can i get good quality steel parts to replace them....I need to know what other parts I should get also as I"m gonna shoot 'em a bunch for the year.....the transfer bars and firng pins are going too....Guns are only 2yr.s old thanks....