Cutters for ali need to be Open Architecture to allow chips to clear, single flute allows this, but this guy (Roy Kloss) does a range of cutters for ali have a look - http://www.sorotec.de/shop/Cutting-Tools/END-MILLS/

I am not endorsing Sorotec but he has a good range and I have been satisfied with his service. The cutters are probably sourced from China - but faster delivery if you are in a hurry, otherwise you might find the same on Alibaba.com.

Cheers,
Rob