setting fruit over 90F?

[habitat_gardener]

I went to a garden tour given by a retired plant-sciences prof. He claims there is no list of tomatoes that set fruit at higher temperatures. (It's been over 90F for most of the past month, but gets down to the 60s at night.) He said when he first moved here, he tried a couple standard hybrids that didn't set much fruit at all (which he'd grown successfully in Michigan). Now relies on Fourth of July, and is also growing Steakhouse Whopper and Park's Whopper. Doesn't believe in the "holiness of heirlooms."

I moved to this area last year and planted late in the season this year and last, so I don't have a good list of reliable varieties for this climate yet. Still, I have pretty good fruit set on my 50 or so plants.

I'd be interested in a list of heirlooms/OP varieties that might do well with 90F days and 60F nights, about 30-50% humidity, no rain all summer. (Doesn't Brad Gates grow his tomatoes in this area?)