Welcome aboard eh? Do you mean that movable section of rail with a latch on one end and a hinge on the other? If so, and the fittings are the same (side and aft) perhaps have a longer piece of teak made and use the aft fittings.
Of course, then, that will leave you without an aft "gate". Unfortunately, most, if not all of the cast bronze fittings on Taiwan boats were made "in house" at the factory and will be very difficult to match IMO. So I suspect your only recourse would be to buy one new set of hardware and put up with the mis-match.
Just a suggestion: https://www.go2marine.com/product/20...ed-finish.html