Just a quick search on a few days in the first week of October (I randomly chose that month) yielded some results, albeit they will require an overnight in LAX/SFO (not a bad use of the Amex Marriott free certificate). The screens (different dates) were taken with incognito (no status or cc). The image with price with decimals is a 35K with Aeroplan Reserve cc, just to show the ranges. Of course 50K and up will see it discounted even more.
Coming back I suspect you'll have to go through the US again (didn't search sorry). I've seen some dates previously where you could fly YVR-ORD-TYO in first class and the price was actually lower than the published rate.