Nomocharis are a wonderful genus of about 7 species. All are very beautiful and no more difficult to grow than many lilies to which they are closely related. They tend to hybridize and the two illustrated are likely somewhat hybridized.

The top image is typical of Nomocharis pardanthina forms found in many gardens where they are grown while the bottom is very close to N. saluensis. They set good seed if cross fertilized but the most likely source will be a seed list by a society like the Alpine Garden Society or Scottish Rock garden club. Even here you may only get 1 or 2 two viable seeds in your allocation and collecting and sowing your own is the only viable long term option for a large collection. They are long lived once established.