Sorry no exhausts from me, just some ideas
I do love the sound & quality of Akraprovic's, but they are so expensive to purchase around £700 in the Uk.
If it were me & I had to have a set & nothing else would do, my top tip would be to find & purchase a (whole) bike with them already fitted & remove them. Swap over some standard pipes & sell the (whole) bike on again.
If it's a fuel injected bike you might be lucky & find it's had a Dynojet Power commander fitted too (you'll need one).
I know it sounds outrageous, but it would be cheaper than buying them new
