Lowe’s or Home Depot,,Have small Neo mags,,been awhile sense I’ve bought any ,,believe they go for around 4 bucks for a stack of Three,,built a few sawblade mills ,,mainly I used ceramic mags topped with a couple neo’s for extra strength,,used super glue ,,then surrounded with Epoxy Putty,,it’s a hard as rock epoxy ,,that’ stands up to vibrations and heat,,Lowe’s or Home Depot,,good luck with your Build,,😜