Sandy, I have tried the "Five" ice cream from Haagen Dazs. I agree, it is on my "short list" of "good" ice creams.
The only custard I have had is from a "smaller" burger chain restaurant, called Culver's, which is headquartered in Wisconsin. They serve frozen custard, but I generally avoid it, as I've anticipated that it was quite caloric. Just checked their nutritional brochure,
and I guess - for whatever it's worth - there are 308 calories in a single scoop of vanilla.
Back eons ago when I was a grad student at University of Wisconsin-Madison, my favorite ice cream from Babcock,
the dairy store was something called "orange custard chocolate chip."
I just checked, and they still make it.