eBay with Sun Joe has the Snow Joe Sun Auto Cleaning System for Most Pressure Washers (SPX-ACS-MAX) for $49 - 20% off with coupon code SUMMERJOE [Exp 9/7] = $39 with free shipping. Sells for $59+ elsewhere.

This kit includes a utility bristle brush, rotary wash brush, wheel + rim brush, an extension rod + the 90° angled nozzle and 16"x16" microfiber cloth.