The armor simply needs to be strapped to fit.
the forearms and other parts are designed for the overlap assembly common in the past.
most likely you will be hard pressed to get a color match on the ABS for making finishing strips.
the GF brand is many years old, and his plastic was made custom for his shop.
even if you contact AP he may be able to supply you with a color closer than
other makers out there.
the overall assembly of your armor is not that bad. since all the parts are velcro you can reposition the thigh pack
and knee plate pretty easy.
you will need to cut the fronts of the leg parts to a butt join and add cover strips.
the forearms should not be tailored to fit, just made the correct size if your arms are small enough.
strapping is used on the original suits that travels from the shoulder all the way down the arm.
this holds the parts in position.
when you bring your thighs up and outwards the armor should fit you perfectly.
this will allow you to walk better. the goal with the lower torso is to wear a harness
so that it pulls the lower torso up as high as possible. then the legs fit better.
strapping the rear of the torso correctly will fix the belt location and the kidney plate.
get new hovie tip helmet tusks... those are garbage! any experienced EIB level TK should be able to sort you out
in a single day.