I'll look out for the polka dotted ones - they are very small yet, so it'll be a while.
I think the place I got the first lot from that are all either three or four year rosettes (some starting to flower, so I'll save my own seed!) and they did have a catalogue which listed them all individually, but no pictures, so trying to ID them from vague descriptions will be a chore.
Here's a picture of the seedlings - seeds were planted in June, and they came up within a week (no cold period needed for these) and they should be good to repot into two inch pots by early August. I want them big enough to winter outside, so that will be a learning curve too!