Agree - grabrails are good. Would you definitely use it on the driver's side? Meaning, you already have the wheel to hold onto.
BUT... if you move the stbd one over to port, you only need to get one new one. You "could" find a longer one that you like and just have a local welder add an angled shim to the mounting feet.
Or, is there enough vertical surface there on the port side to mount a regular handrail? Would it get in the way of anything?