DIY Oppos: magnets?

So I’m planning a couple quickie woodworking projects, making some wall-mounted and free-standing magnetic knife racks.

(Pictured: $2.99 Harbor Freight rack)

I’ve got everything I need except the magnets, and I’ve looked at a couple possible sources online for neodymium bar magnets, but I’m not sure who/where might be the best to go with.

Any of y’all ever buy some bulk magnets from a place you’d recommend?

Edit: so far I’m thinking magnet4sale.com and appliedmagnets.com’s surplus sale.