Do you have any recommendations about the newer variants and where to find them? A brief search turned up Peterson Pawpaw, but maybe you have others in mind.
If not, then Peaceful Heritage is very reputable, the main problem with them is that their grafted pawpaws only go on sale one day per year and are completely sold out in 20 minutes.
If you can't get from them, then your options are OneGreenWorld, StarkBros, and the other usual suspects.
Logees also sells Shenandoah and Susquehanna as a set for super cheap and they typically have a lot of inventory in the spring, so I'd recommend picking up those cultivars there and getting them shipped.
Also, Cliff England no longer ships trees, but still sells to customers that are willing to drive to KY: http://nuttrees.net/
I got mine from Edible Landscaping in Virginia. The owner is super friendly and very helpful. One of my grafted saplings died almost immediately after planting, and he replaced it no questions asked.
https://ediblelandscaping.com/collections/pawpaw
Just don't get NC-1, Mango, Rappahannock, Prolific, Overleese, Wells, or PA Gold.
Don't get me wrong, if you get one of those when they're perfectly ripe then it may well still be a completely life changing experience. But you can also do better, and given then you're going to have them for the next 25 years, it's worth doing the extra work to get the absolute best cultivars you can rather than just buying the first ones that are in stock, even if it takes an extra year to get started.
KSU Chappell, KSU Atwood, Wabash, Shenandoah, Susquehanna, Potomac
If you're on the east coast and willing to drive to New Jersey, then I'd recommend ordering from Charlie West: https://sites.google.com/view/westfarm
If not, then Peaceful Heritage is very reputable, the main problem with them is that their grafted pawpaws only go on sale one day per year and are completely sold out in 20 minutes.
If you can't get from them, then your options are OneGreenWorld, StarkBros, and the other usual suspects.
Logees also sells Shenandoah and Susquehanna as a set for super cheap and they typically have a lot of inventory in the spring, so I'd recommend picking up those cultivars there and getting them shipped.
Also, Cliff England no longer ships trees, but still sells to customers that are willing to drive to KY: http://nuttrees.net/