& welcome to the giffgaff Community
Unfortunately we simply don’t know as we are giffgaff members like yourself on the community therefore, never updated on replenishment of phone stock or when specific colours are back in stock. All i can suggest you keep checking the giffgaff site on a regular basis to see if the device is back in stock. You can access the phone section by following this link http://community.giffgaff.com/t5/Getting-started/Buying-a-giffgaff-phone-with-a-loan/ta-p/10724769
if you wish to spread the cost of the device over a monthly period using the loan option.