I’ve sometimes used Bianchi Speed Strips for holding revolver ammo. For me they’re not as fast as speedloaders, but they’re flat so in some cases they’re easier to carry. Jay G has videos demonstrating both.
Thing is, Speed Strips are only available in .357/.38. For years people have begged Bianchi to offer them in other calibers. They didn’t, so someone else finally did.
Stephen Camp has a review of the Tuff Products Revolver Quick Strips for .44/.45/.460 and .410 shotgun. Tuff also has strips for the .475 Linebaugh,.480 Ruger and SW .500 Caliber, for .357/38 (in six or eight round sizes), in .327 (eight rounds), and in .22 rimfire (10 rounds).
I don’t have a revolver in .45 anymore, but I might buy some of these for my little .410 shotgun, Katrina.