Silverhill Seeds in Kenilworth, South Africa currently offers seed of F. Crispa, and F. Farrariola. They have offered F. uncinata in the past; but it is not currently available. They are reliable, ethical, and reasonably priced and they accept credit cards.

I am growing 4 species, but they are young and haven't flowered yet so I cant offer to swap.

Here is a link that might be useful: Silverhill

In my previous post I made an error. F. uncinata is a synonym for F. Crispa which is available from Silverhill Seeds now. In addition Bulbmania has F. divaricata.

Here is a link that might be useful: Bulbmania

In addition Bulbmania has F. divaricata.
F. uncinata is also known as: F. crispulata, or F. framesii

Here is a link that might be useful: Bulbmania

RE: Ferraria 2 was supposed to have been deleted