Quote from Rearden Metal:
Well, Briefing.com platinum does have these lists, but the gapping up list doesn't come out until about 9:15 et, and the gapping down list even later.
WSJ & IBD are generally for investors, not traders.
Both my lists from briefing usually appear at around 9:00 EST - with a few exceptions every now and then.
Why is the original poster looking for a list 90 minutes before the open? You will miss a lot of gappers as many will not show up until much later.
Prophet is good, but I don't think you can get the list until after the open (I may be wrong) which works for me.
FYI, trader-x (great blog) uses these and also uses RealTick which he says has gap lists:
http://traderx.blogspot.com/2005/11/trading-faq.html