Do you need to jack it up? It'll fuck the handling right up.
I was thinking about lifting the seat and stuff but by cutting the subframe and redesigning it to look something a bit more like the last 10 years but couldn't be arsed in the end.
Anyway i had to have my say,
Jacking the backend up like that causes the top run of the chain to pass closer to the swingarm pivot. You have to be careful.
Having said that I don't know where you can buy ready made links. Got any friends who can use machine tools?
As was said earlier, it is better to raise the seat. More work though as you really need to do it by relocating or rebuilding the subframe.
Hey, who said it would be easy?!!