I have a few more old courts (US Open 1990, Australian Open 1990, Monte-Carlo, Rome and Miami from some time in in the 90s) half finished (I'll finish them some time
If you want to make your own 3D courts, the best thing to do is look at already existing ones, see what parts of the texture fit the different areas of the model and the alter them to fit your new court. Making a texture isn't too hard, it just takes a while.
One thing that is harder about making the old stuff is that you have to sometimes dig a little deeper to find good reference images of what you are making (Youtube seems the best option for old courts).
You will need a good editor (Photoshop, GIMP etc..) if you have one already.