Welcome aboard Graham, sorry, can't shed any light on your question but I'm sure someone who'll know will be along shortly, you could post it on the street triple thread too, good luck.
Putting feathers near your exhaust is surely a fire hazard, please clarify your query, er, and, how about a bit of an introduction rather than banging straight in with a question
Wot no intro? no foreplay? straight in with the question, well we don't bite but we do like to know a bit about you. But to answer your question there are many low boy types of exhaust try Google or e-bay, see below link, https://www.ebay.co.uk/p/Arrow-Low-Boy-Exhaust-Triumph-Speed-Triple-A9600700-2012-to-2017/2271036063