Here's a link that purports to have live odds for the Belmont Stakes. (the clock is updating, but I haven't seen the pool increase in 15 minutes. Still, it's not yet 7am ET.)
https://www.belmontstakes.com/racing...akes-live-odds
I don't understand what they're calling the "Morning Line Odds". They have Justify as 9-5, and all the others are off, too. But the "Live Odds" numbers seem reasonable, with $371K in the win pool.