急~!!!!!!!!! 伴奏啊!!!!

It sounds to me there is no such file online for sharing. Nevertheless, there are some MV putting in Yahoo and other websites for sharing purposes. In such a case, the chance has come.
If you have installed Winamp Player, please also install a file called "vremamp.exe", the program of Vocal Remover, which can enables you to remove the human sounds appeared in the songs if you have to produce the pure sound yourself ( I believe this is your purpose leaving post here ).

Procedures are:

1) Install the above program to the directory C:/Program Files/Winamp/Plugins. The address to download Winamp is http://www.analogx.com/files/vremamp.exe
2) Open the Options -- Preference of WinAmp software.

3) From Plugins / DSP-Effect, you can find AnalogX Vocal Remover. Click on it and then you can select 100% to remove the human sound totally.

4) Press Enter and let the program prepare for you.

Your pure music can be prepared easily, so that you need not searching in Internet for hours without any output.

Alternatively, you may visit different useful websites as shown below for other relevant information:

1) 管樂星球 -- 下載天地
http://gogomusic.com.tw/

2) 魚蛋村音樂區
http://www.yudans.net/main/

3) 蟲蟲
http://www.gangqinpu.com/

4) 香港流行音樂聯盟
http://www.hkchord.com/guitar/

Hope I can help you.