A rebuild, no as they are a sealed unit.
Many people have had very good results with replacing the oil in the stock rear damper (shock).
Remove the shock from the bike. Remove all the air. Remove the air hose. Invert the shock so so the oil will drain into a graduated container. Refill the shock with the SAME amount of oil that you drained out.
As to type of oil, I used oil for a Kayaba shock. Others will tell you to use oil of ?? style/brand/viscosity. The shock is a Kayaba shock, I use Kayaba specification oil for shock absorbers.
As to quantity, most drain out in the neighborhood of 6-8 ounces, or 200-250ml. I think it is critical NOT to over fill it. Refill with the exact quantity you drained out, unless your shock is leaking.
Another option is a Progressive brand shock, what I run now. If they are still available, I don't know. Then there's shipping/duty to Netherlands :-/
Rick