Rutland Gutter will fabricate Copper Fish Gutter Spouts - Rain Spouts to fit
6" to 8" K-Style Gutters or Half Round Gutters.
Rutland offers a matching copper fish downspout extension elbow (at link below)
Fish Downspout Extension Elbow
Rutland Gutter will fabricate Copper Gargoyle Gutter Spouts - Rain Spouts to fit
5" to 8" K-Style Gutters or Half Round Gutters. These gargoyle rain gutter spouts would replace one or more end caps.
Rutland supplies a Gargoyle Roof Scupper Spout - Copper Rain Water Spout with 4 3/16" opening
(as seen below)
Rutland's Rain Spouts - Gutter Spouts and Roof Scupper spouts have CAD Detail Drawings with Specifications (see the PDF link below pictures)