Is there a rip fence available for DEWALT circular saws?

As far as the rip guides are concerned:

• The DW3278 is the correct rip guide for the DCS573. It is also compatible with our DCS570, DCS574, DCS575, DCS578, and DWE575.
• For our DCS391, DCS393, DCS566, DCS565 the correct rip guide service part # is 381091-00.
• For DWS535 and DCS577, the correct rip guide is the DWS5100.
• For DCS571, the correct rip guide service part # is N633323.

In most cases, the rip fence didn't come with the knob and the spring attached. Knowing this, these are the parts numbers associated with the parts:

• KNOB: Part# 055005-00 I
• SPRING: Part# 058287-00 i

You can visit ServiceNet for more details.