Coloured rings for 1/4" sockets on back of kemper

When I'm playing live there's always a dash to get the cables in etc.. and to be up and running. I generally only need my power amp and MIDI connection however, sometime I need to run though an other power amp and I need the monitor out. Does anyone know of a replacement ring/coloured nut I can put around the "monitor out" to speed up my setup. I know I could use tape but really I'd like a neat solution.