The only solution with hashgachos that don’t use DE is to call up and inquire about specific items. I know that Oreos are parve; the Daf HaKashrus Vol. 11 No. 4 states that : The following certified HAAGEN DAZS SORBETS contain NO dairy ingredients of any sort, but are labeled as they are produced on dairy equipment:
Chocolate sorbet, Chocolate sorbet bar, Lemon sorbet, Mango
fruit sorbet, Orange sorbet, Orchard Peach sorbet, Raspberry
fruit sorbet, Raspberry sorbet, Strawberry fruit sorbet,
Strawberry sorbet, Zesty lemon sorbet.
Unless anything has changed since that publication, you can certainly then have these sorbets after a fleishig meal.