People have been looking for a reusable solution for the Corellian conflict and Here are some pics of my solution:
You can buy a 24x18 picture frame from michaels for $20, and you can get a 16x36 piece of ductwork (which is maagnetic) for another $6.
Cut the ductwork to 16x24, and it will cover all of the relevant area.
There's a lot of material in the way, so use some rare earth magnets, which luckily have really come down in price:
Here's a link to 200 of them for $4, which is actually a lot cheaper than I expected what?