When I bought my 2018 Street Twin a couple months ago, both mufflers and front beauty covers were scratched like previous owner went racing down a narrow creek bed! I found a RH but would like to find a Left muffler # T2201738 in good shape with no scratches. UPDATE: found replacements. No longer needed.
Shame, I have a pair of speed twin (black) pipes that would have looked good on your bike. But I’m also based in the UK.
I've got a pair of barely used ST cans as well but with all the better options out there I don't understand why you'd want to fit standard end cans. TEC, Motone and others are all improvements.