Does Haisute has an official online shop that I could buy their stage goods?
Sort of. They’ve just recently made some goods available on Animate Online.
Please note that you will need a proxy as they do not ship overseas (the Animate International shop ONLY has the DVDs for overseas shipping).
The goods only go as far back as the Revival show (so no goods are available for the first run and its rerun). And not all the goods that were available then are available online (e.g. the acrylic standees). But for Winners and Losers and onward, all goods that were available at the theater are available for order/pre-order online.