Is it polite to ask someone to work for you for free, so that you can make money doing this?!
I'm not asking to work for free... just asking if someone already made or simply have found this code over internet... I already searched and not found.

As Jez says, why do you want to do this?
Don't you trust your supplier?
NO!

And everyone else is busy with their own day jobs!
Me too... I just think I dont need to reinvent the wheel... but is necessary I will do.

"share" implies some mutual benefit - what are you proposing to offer in exchange?
If you really want someone to do this for you on a commercial basis, you will need to do 2 things:
Provide a proper specification of what, exactly, you require;
Pay a proper commercial rate for the work.
Everytime I can, I give, help, assist, and all possible... not here because I dont have knowledge in this area to share, you are the experts... but there are other areas or simply a day job I do for persons and friends for free.
I think for everything I already shared I deserve it... if you think not, just say no or say nothing.