Do you mean Delvac 1 ESP? If so, you may wish to check out NAPA. I was in there on Saturday and they had cases of it for sale up by the front window, it used to be $19.99 or something but is now up to $21.99.
I used to buy it for my old Sienna but with Castrol Edge 5W-30LL on rollback at Walmart I'm using that now.