Where to get dremel bits?

JUst wondering if theres somewhere online to get grinding bits for cheap. Whether its dremel brand or some other brand. I go through these so quick since im always grinding those damn hori tabs. lol
Theres no point of buying the packs since theres stuff in there that i dont need.
I know i can buy them by the single, but their like $3. I want to get a dozen or 2.
thanks

Your best bet is probably Amazon.