Reddit reviews 2L inc. Solid Carbide End Mill, Two Flutes, 1/8" Cutter Dia, 1/4" Shank Dia.500" Flute Length, 2.0" OL, Uncoated, Made in The USA, Part No. E2-250x2.0-.125-.5
We found 1 Reddit comments about 2L inc. Solid Carbide End Mill, Two Flutes, 1/8" Cutter Dia, 1/4" Shank Dia.500" Flute Length, 2.0" OL, Uncoated, Made in The USA, Part No. E2-250x2.0-.125-.5. Here are the top ones, ranked by their Reddit score.
Two Flute Solid Carbide End Mill - High Performance.1/8" (.125") Cutter Diameter.1/4" (.250") Tool Shank Diameter..500" Flute Length, 2.0" Overall Length.Made in the USA.
This should do nicely: https://www.amazon.com/2L-inc-Carbide-Uncoated-E2-250x2-0-125-5/dp/B01J2KKGDY/ref=sr_1_2?ie=UTF8&qid=1527553815&sr=8-2&keywords=1%2F8+dia+1%2F4+shank+2+flute+endmill
As far as what works in aluminum: 2 flutes, coated HSS or carbide, but you cant really make use of the cutting ability of carbide without the machine rigidity to take a super heavy depth of cut. And I'd get in touch with your local Kennametal or other cutting tool distributor, they can probably get you some free samples. Oh and safety glasses, all the safety glasses. Lexan machine guards if you can.
Best of luck!