Does anyone have a source for Begonia parviflora - that does mail order?

I started coveting this plant about three years ago when I saw it described in a wholesale growers catalog (Beds and Borders, Inc on Long Island, NY). Unfortunately all of the retail outlets that purchase from Beds and Borders are located in the Northeast; all are walk-in retail and none of them ship.

This plant is used as a tender perennial usually in container plantings ... it is used as a strong, large accent plant because it is apparently very large.

Any leads will be greatly appreciated. Thanks.