Data Swapping on the fly

In trying to better this project i am working on, and getting great help from this forum, I have a new question. Is it possible to swap data in a cell on the fly either through a button, check box or radial?

What I have is a "bid" area on a work book that is supplied info based on the user choice. So what happens is the user goes to a part page, picks and item, and then clicks a button to add the item to a bid sheet. From there the corresponding cells are auto filled via VLOOKUP. The item that is transferred is the part number; also this is what I would like to “swap” on the fly. The part numbers have generic descriptor (which I already have stored on another sheet along with the rest of the data that is auto filled via VLOOKUP) but because the user is transferring that data for VLOOKUP to work I am not sure it can be done.