If you find something, make sure it is from a cutting of a flowering plant. Crabapples from seed can take 20 years or more to bloom. Brent's plants (evergreengardenworks.com) are almost all from cuttings, and he specifies when they are not.
They are not an easy species to grow, with fungal diseases, numerous pests and other peculiarities, but they are definitely worth the effort.