Post #57 of my build shows the spring fitted and the same mount bracket - photo is off @
MB motor. Brunswick can supply you with the spring and the bracket for sure. I sourced these from them - as usual they sent two variants, a single and a double coil version. Both are dimensionally the same, spring rate just doubles. OD of coil is 15mm, wire dia 1mm 14 active coils on the single. double has 14 active coils also, wire dia 0.75mm, inside of coil ends is 60mm approx overall. I run the double coil version, but carry both as spares.
pump spring.JPG