You probably have the same experience, working on a bike and more and more stuff comes up. So this time both mufflers need to be replaced.
Now I have seen some good ones , but they came of a SC21 model.
And does this fit on my SC24 model?
I am sure one of you has tried this before......

 

I don't know myself but you could check to see if the part numbers are the same in the micro fiche/manuals section.

 

They fit at the collector box but the mount points and pipe cover differ and would
require some mods. Summary they could be made to work but might look a bit funky
ans the can diameter is smaller and they look thinner.

I'd go Gen 2 or Gen 3 before I'd go Gen 1