We sell our products to retail nurseries, garden centers, container growers who sell to landscape contractors and retail nurseries, mail order nurseries, and anyone else who qualifies. We do not accept direct sales to consumers.
Regarding rootstock, the most important consideration for fruit tree success is that the rootstock be appropriate for your site. A semi-dwarf fruit tree may or may not be on a rootstock adapted to your soil and drainage. In any case, most "semi-dwarf" fruit trees can grow to 12-15 ft., still too large for easy tree care. Tree size in the 8-10 ft. range is mostly achieved by summer pruning, not by rootstock selection.
If well-adapted to the site, however, trees on semi-dwarfing rootstocks can be easier to control than a too-vigorous "standard" tree.
For information about keeping home fruit trees at manageable size, see Backyard Orchard Culture.