Maybe. There are internet sources that have somewhat reasonable prices, but shipping can be high for just one box. Most dealers will not carry it, and if they do, it will probably run you $30-$40/box. They can usually special-order it for you. Gun Shows (while they still exist) may be a source if there are any in your area. Most aficionados of .38 S&W-chambered revolvers load their own ammunition and avoid the supply problems altogether.
Perhaps I am getting ahead of myself in that I am assuming your revolver is chambered in .38 S&W, and not .38 S&W Special. .38 S&W Special ammunition is readily available (or maybe WAS available until the happenings of a month ago) almost everywhere in the civilized world.