Wholesale you have a number of options, but sometimes a nursery license or a $500 minimum purchase may apply.
I bought 111 viburnum bushes… rooted liners up to one gallon size. spent $600.
American cranberry bush and blackhaw are among the count, but so are ornamental cultivars.
Musser probably good for a few home grown ‘christmas trees’…but I had a bad incident with them a few years back…got pawpaw bare root. Called them and they talked me into planting them saying they’d probably grow. I’m not that stupid, I know when there is no moisture in the trunk of a seedling. Anyhow, got a refund some months later. But, I wasted a season on dead plants.
So, I’ve found other sources. Lawyer Nursery used to be my preference for “bulkish” bare root trees and shrubs…alas, they don’t exist anymore.