Hi there believe it,
I am running a Prestwich tuned pipe on my .60Nitro. Kind of like the CS20 on this link but for .60's. Looks from the page that they don't have any 60 pipes in.
See link here:
http://www.prestwich.ndirect.co.uk/tunedpipes.htm
Looks like you will have to copy and paste. Good pipes, water cooled and very quiet, even the CMB90's are quiet wearing these, and powerful once set up.
Glenn