Dynamically setting up org in oracle forms

We will be receiving PO for two different inventory org at same physical location in our company.

Standard oracle Receipt form is org specific, you are asked to select a org which is then passed to find screen of receipt screen.

We are looking for a workaround to either customize the exisiting receipt form, or create a new custom form where user can enter PO number and depending on which org it is assigned to. We can

set up  org in receipt form .

Any insight on how it can achieved will be very helpful..

Thanks,

Ruchi