All dumps (besides PS Vita) courtesy of Psynapse from Game Fuckery Inc.
Ratchet & Clank 1
PS Vita dump
(mono, poor quality)
PS2 Beta
(stereo, good quality, only a few tracks)
Ratchet & Clank™ 2
Ratchet & Clank™ 3
Ratchet 4th : Deadlocked/Gladiator
(not avaliable)