I have ordered from these guys a few times and been happy. Looks like they are running a Black Friday sale. Code is valid for US or CANADA on their respective websites.
USA - www.autopartsway.com
CANADA - www.autopartsway.ca
'18 Highlander - AMSOIL SS 0w20 / ATF / Severe Gear
'06 Santa Fe - 535,000km AMSOIL SS 0w30 / ATF (R.I.P)