Well according to shells Aeroshell book ( Free online and they will send you a hard copy also free (IN UK) the spec you give is for Aeroshell 51, see link
http://www.shell.com/static/aviation...ulicfluids.pdf
but they do not do it in the sizes you require, though they do list 5 gal containers
http://www.shell.com/home/content/av..._10081027.html
have you asked these people direct though ? as they do list it in the size you require on the bottom link
http://www.radcoind.com/index.html
They list it here in qts
http://www.radcolube.com/pdf/MilSpecRefChart.pdf