Don't waste your time looking for it. Its not there and won't be there until late September at the earliest. Disappointing.
Will the US DLC work with EU TPA installations?
I never did use a fake account so far fearing the problems and incompatibilities that arise from time to time.
I believe all content is region locked. So if you have the EU Pinball Arcade you should buy EU add-on packs other wise your out of pocket.
At this point it's all speculative , from other games I understand DLC will work if the game is based on same language , but Jap DLC wont work on english DLC , again we need a FarSight employee to clarify this . I will say:
making a Sub account would be a good thing if you live outside North America and plan on buying the base game and DLCs , but maybe not if you already have the base TPA already (why buy it twice ?)