The tables that STICK uses all have entries for the a4000 firmware 102a (stable and trunk for both English and German) so it should be able to create a card for you. However the message you see - "No official build is available for this camera" should only appear when STICK has identified the camera/firmware from the photo you used and not found it in its tables. If the photo doesn't contain firmware information you would have seen a different message.
So my question is - did STICK correctly identify the camera and firmware as a4000 102a, or do you have a different firmware version?