Sales Order Replace Product Pop-up --- Accessible?

Hello everyone,

I'm trying to modify how the Identified Stock (iStock) works with regards to sales orders and picking. In a sales order, in the Items tab, one can click the Replace Product button to, as you may have guessed, replace the item product. On this pop-up, you can list all instances of a certain product, etc. This screen clumps together iStocks from the same location, so if I have two instances of a product in stock --- one in iStock with ID 1 and location X, and another in iStock with ID 2 and location X, it will display a single line for that product in the search, with the total available being the sum of the quantities from iStocks 1 and 2. Screenshot for clarity is below.

So my question is twofold: 1) is it possible to access the pop-up screen using the SDK so I can make changes to it, and 2) is it possible to change how that screen displays stocks, so that individual iStocks are displayed as distinct row?

Many thanks,

Lewis