Looks like a 2704N.
I gave up trying to improve mine using the stock parts. There's a limit to how much time you can spend adjusting it, when it always seems to go 'out' again after just a couple of hours of use. I replaced the removable fence unit once but even that didn't give me much more than a year of hobby use before it was acting up again like the originally supplied one.
There are no direct fit replacements marketed specifically for that saw, to the best of my knowledge. Generic options can be fitted by removing the original fence, but you'll lose the convenience of the expanding rail as you extend the right side platform etc.