You can pick em up for about 6 quid each, you want 2 flute High speed Steel, I'm looking at J&L Industrial Supply UK catalogue, page 200: says...
Disposable End Mills 3mm dia, length 4.5mm
5% Cobalt= £4.16, TiN Coated= £8.16, TiCN Coated= £9.70
I've used them before and the company is good, might be best to give em a call?
Here's their web and number:
freephone 0800 66 33 55
Get em to send you a catalogue, it makes a huge noise when it lands on your floor lol.
No financial interest in the company btw, just happy with their service/ supplies.