I'm guessing you're in the US since you linked amazon.com, but if you happen to be in the UK, Overclockers have it (the black one - https://www.overclockers.co.uk/in-win-305-midi-tower-gaming-case-black-window-ca-082-iw.html).
You could also try contacting amazon support to ask whether they will have it in stock any time soon (since they are very responsive, but likely won't be able to tell you).
However, looking at price tracking website (https://camelcamelcamel.com/InWin-305-Black-Computer-Tempered/product/B0753NH32N), looks like they haven't stocked it since Feb last year (assuming the tracker is correct), in which case getting it on Amazon seems unlikely.
Otherwise your best bet is to finding somewhere else on google shopping search or getting it from InWin directly. You could also see if Overclockers deliver to US and which option works out cheapest.
Muwatallis got a reaction from m0oble in need help finding a certain case for sale
