This company has lots of OEM parts, but I suggest finding someone to do it for you.
http://cnn.cn/shop/apple-iphone-c-256_374.html
You'll need to do a search, but I know that there is a company that can replace the logic board for you. I just cannot recall who said that they do it.
You might want to contact either :
http://www.colorwarepc.com/p-103-iphone.aspx
or
http://www.ipodjuice.com/iphone-batt...t-products.htm
As far as other members of this forum, you need to take everything with a grain of salt. Remember, at least 70% of the emotion and inflection in these posts are of your own creation. The other 30% is usually (but not always) a little sarcastic and in jest.
If someone cannot offer help, ignore them -plain and simple.
Found it:
http://www.ipodjuice.com/AB4F1D8928C...ome+%3E+iPhone
Look under
NOTE 1