I had the same problem so I went to the answer store....Lowes (but any place will work) and bought some of those little refrigator magnets that look like push pin tacks. You know, the ones that look like thumb tacks with the "spool" plastic ends.
If you squeese them with a vice or pliers, the plastic breaks off and you have a perfect little magnet 1/8" round and 1/8" long. They are fairly strong and very cheap. I think it was $1.95 for 10 of them. Don't really rember.
Think outside the lines.
Rog