Wow,
That bike is in fantastic condition, correct me if I am wrong, are those the original tyres?
The paint job is really bright, mine has faded but it has done thousands of miles over the past 16 and a bit years.
The forks are not too difficult to service if you can get the parts, you can use some Mag 21 parts the oil seals are far better. To fix the leak all you probably only need is the air valves that you insert your needle pump into. As I couldn't get these I installed bolt in car valves they did the job but it was very difficult to get close to the right pressure.
My frame is bigger, the steerer length of your forks will be shorter than the 195mm on my bike so you should have more success in finding replacement forks as per your other posts. Personally I still want gold Mag 21s these Quadras are a poor ride in comparison to the air/oil Mag forks.
I've added a pic of my bike below to compare
Look after that fantastic bike
Clifford