The Nitto M18 has adjustable struts where you can customize the angle and length, as they attach via eyebolts to the rack platform rather than being welded to it. That's your best bet.
The issue is that the VO rack is designed for a fork with a greater distance between crown and cantilever mounts than yours (to accommodate a larger tire and fender). The struts are longer than necessary for your fork because your fork was designed for a relatively small tire (32mm) and therefore the designers did not add a ton of tire clearance at the fork crown, meaning the cantilever mounts are closer to the crown than VO designed that rack for. I would get the Nitto rack and not try to bend the VO rack anymore.