Its always nice to stay original but the forks need repairing so your choices are limited, it also depends on your budget and what you will want to do to the bike regards to keeping originality or going the whole hog and getting it resprayed etc, clean up the paintwork and decide from there is it really worth keeping it or get it painted as much to the original as possible? Does the costs outweigh the value of the bikes worth? Do you intend to keep it or just do it up to sell on? Do you have any good pics to give us an idea on the condition to help with an answer? Also if your on facebook, try and get on the Moulton Bike facebook page, your answer will come a lot quicker than here and its easier to post pics etc.