Rohrer & Klingner
Available in the following colours:
Sunflower, Morinda, Pernambuco, Magenta, Old Bordeaux, Solferino, Cassia, Royal Blue, Permanent Blue, Sea Blue, Verdigris, Vridian Green, Verdure, Old Golden Green, Sepia, Leipsician Black, Scabiosa (Iron/gall), Salix (Iron/gall)
To be clear, the company produces a number of different types of ink: Caligraphy, Traditional, Drawing ink etc. The only ink you should consider for your fountain pen is their Writing Ink line. The ink for pens has been available in North American since 2006. Pen stores if they stock the ink, will typically stock writing ink, but if you are in an art supply supply store, the other lines could be available.
At the time of my first review back in 2012 I had to order my ink from the United States. In Canada Stylus Fine Pens of Edmonton also stocked the ink. In Europe there are numerous pen stores listed stocking the product.