4 flute end mills for steel and stainless - Practical Machinist
The OSG WESX coated tooling is superior but expensive enough to make your eyes water. YG-1 has tools for hard steels that work well and are very affordable. They also have a direct shipping program out of Chicago. Red label for up to five pounds for $15.00 to the Continental US and they will break up an order if it makes sense.