Machinable Magnet Chuck

I have a small part (.100 thick x 2.5x 6) out of 1018. Quantities are looking big. First go around I double disc ground the material and used bolts and clamps to gain access to the sides and center of the part. The part gets .030 thick over 1" so a vacuum is out of the question in my mind.

I'm wondering if anything exists where you can drop the part on a magnet, align it with some pins, turn the magnet on and have free range on the part with no moving clamps or anything. Does this exist?