Buy them? Is there a freecycle in your area? I got a great drum set off a freecycle group! http://www.freecycle.org/

no freecycle in my area. i figured sony would replace whats broke.

If you’re talking about the video game Rockband, there is already a thread about that on fluther somewhere. I’ll let you search for it. From what I remember, the company is slow on getting the replacements out.