Account Receivable (AR) Account Setup at Item Level

Dear Experts,

I have a requirement to setup Account Receivable (AR) Account Setup at Item Level.

I am aware of limitation in GP that it doesn't allows at Item Level, so need to plan for Customization.

For Customization i thought below options,

Option 1: Include Additional Field in Item Accounts Window (GP Window) and capture entire information in Custom Table

Option 2: Create an Individual Custom Window to capture AR Account for Item

Kindly guide me which will be more effective.

Thanks,

Praveen