I got a couple of really nice little ones from thevioletbarn.com
They were very reasonable. They have great little polyneura, bella, and 'Louis Bois', retusa, and linearis. Highly rated over on GardenWatch too.
I got two linearis from them, both have grown well, and each now has a few stems over 14" ( 17 cm. ), one has a stem over 22"; this is in less than 2 months.
Their packing was very good and even though there was no heat-pack, all arrived in good shape, with one exception: the retusas had some freezing damage on the youngest leaves. I was surprised that of all the plants I received, only the retusas were damaged. I would have thought retusa might have some frost-hardiness, but it is from the Western Ghats in India and does not ever see frost. The multifloras were fine; go figure...