A German based flea bay seller I've dealt with in the past - Seitz Kreuznach - have come up with their own line of inks. They look to be good value, especially factoring in free shipping to Australia, but I'm having trouble tracking down any information about them. The only color swatch I can find is on this page, and it doesn't even include all the colors. I've sent them a message, but I haven't had a reply yet.
Anyone used these inks? I like the look of the Arctic Blue and Palm Green in particular.