@Madman1978
OK, now that I know what you are looking for ... namely a kit ... I can make a suggestion.
I would suggest a Jr. Emperor ... but be prepared to spend a few $$ . . . Here is a link to the rollerball kit . . . The Fountain pen kit is a few $ more.
The Jr Emperor features the same fine detailing as the Emperor, but in a smaller size. It features the same durable plating and unique and intricate hand-carved patterns that have been richly coated in 22K gold
www.exoticblanks.com
The pen should easily sell for $250 - $300 . . . maybe even quite a bit more.
Unfortunately, your picture does not tell us much about the blank. . If you had rounded it, the pic would reveal more.