Digiprint seems to be a legitimate site. I have purchased epson print heads, Vutek lines/filters/parts, Barbierie Calibration cards, and all kinds of parts from them. Their prices are usually pretty good and I haven't had any issues. After doing days of research on where to get my Epson heads I would give you the noob lesson NOT to EVER buy your heads or any parts from any Indonesian website. It seems that there is a whole criminal market in that country revolving around setting up complete and comprehensive websites for printer parts (probably other items too) and offering them for 1/3rd price, but they are bogus. Nothing gets shipped, they just steal your money.
I recommend only buying parts from major distributors - DigitPrint is in Belgium and Global Garage is in America, both are my first choices for digital wide-format parts.