GR Pricing Date as Document Date

Dear All,

I know that in SAP standard settings when we choose the pricing category key as 5 in vendor master or inforecord, for different prices the system picks the price according to the posting date at the time of MIGO.. What i need is that system must pick the price not from posting date but from document date.

As far as i know, this is not possible with standard settings.. Can anyone suggest me any exit or BADI that i can modify the pricing date as document date ?

Thanks in advance.

Best regards,