We sell, Winter Gem, Green Gem Green Velvet, and Korean Boxwood. All are hardy to zone 4-5 so they should do fine in your zone 5a. They will struggle to survive in very windy locations. We also sell Newport Blue pyramid Boxwood but it is only hardy to zone 6 so avoid that. They are balled in burlap or potted with priced that range from $40-$75.