When BC told me the cost of aux.hyd. spools for my 853, I immediately went searching for the manufacture of the spools. Nice folks but, they told me these were proprietary and nothing they could do.Call a few different dealers, they all set their own prices. There are some on ebay sold by maxxwedge but some dealers will sell for less. 50 to 60 is a good price to my knowledge, probably depends on model
Ken