Corbin makes perfectly fit hard bags. They're a bit pricey, but sometimes you might find someone parting out their bike. Ebay also has them once and a while. There are others here and on Valkyrie Riders Cruise Club. GL!
Corbin looks the best by far in my opinion. But the opening and actual storage space is a little lacking. Just a weird shape inside. But to me, it was more about look over function and I don't even really use them much. Worth it for me, but the price is pretty high.