The gas station at the corner of 407 and 35 sold them last time I was in there. There is also a wholesaler at Valley Pkwy and Mill St that will sell them but I think he has a 1lb minimum.
I switched to jigs only and haven't bought a minnow in several years so I could be wrong on both counts.
"If it ain't broke, don't fix it. If you can't fix it, don't break it"