Your pic:

{{gwi:429777}}

I've never heard of cuttings being sold. Look for Begonias with the annuals in spring. For the price of postage, many people share their plants. Have you looked at the exchange forum? Maybe someone would like to trade for a piece of that beautiful plant! All of this, of course when it's warm enough...

Sometimes eBay sellers will list cuttings but it is a rarer thing to find than seeds or potted plants.

For a look at more begonias, go to planetbegonia.blogspot.com and see a whole new world of begonias.

Thank You for the replies