Pioneer do a replacement component set suitable TSQ-131C.
You may need to install the wires to the dash tweeters or you may be lucky and find them already installed. Theres a few threads about instalation and wiring
Got the same front speakers and love them. Also like Maggi said i also have a small underseat sub and sounds great aslong as your not one for massive bass then the small sub is spot on.
well in that case, whats a good sub i just dont find them that clear when the musics quite loud. just want it a bit crisper and smoother when at a louder volume