Hello Phil,
When I was looking for a C6 I needed one with a fence and most of the ones available didn't seem to have one, I had a good look at fitting one but like you came up with not much.
In the end I waited till I found one that had a factory fence fitted as some of the stuff I rip is pretty big.
It is a great saw particularly after I fitted a pair of Chaco blade guides, they made a big difference.
Merlin